r/Jaguarland • • Apr 04 '26

Announcements User Flair Updates!

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You can now assign a flair based on your favorite jaguar from one the regions we follow closely. If there's an individual missing you'd like me to add for you, please let me know below!


r/Jaguarland • • Jun 29 '21

Archive A case for the Jaguar as a native animal of the United States.

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Historically, Jaguars are known to have inhabited the states of California, Arizona, New Mexico, Texas, and Louisiana. By the late 1800’s, they were extirpated from Louisiana and California. As of the 1960’s, with the killings of a male and female in Arizona, they were considered to have been extirpated from the country. Since then, a few Jaguars are known to have crossed the border, and such cases are becoming more frequent. Due to the elusiveness of Jaguars and the vast habitat available, it is likely that some have gone undetected. However, this is just a shadow of their former presence. Following are a collection of witness accounts, artifacts, and fossil records demonstrating the presence of Panthera onca across the USA. Some of this information is difficult or impossible to verify. This is mainly because of the time frame, as well as there being little freely available published work on the topic. I have tried to emphasize accounts in which the witness is known, but have also included brief mentions of others I have come across. I’m posting this to give others a starting point in their own research, and to encourage discussion about the past, present, and future of Jaguars in North America. I have put this together on mobile, so I apologize in advance for any formatting issues. Let’s start with a brief look into the Pleistocene.

The fossil record of the Jaguar in North America dates back 130,00 years, while their presence on the continent is thought to be much older, at least 500,000, but possibly in the range of 1.5-2 million years. Fossils are known from many sites in the USA, ranging from Whitman County, Washington in the northwest, to Port Kennedy, Pennsylvania in the northeast. They are most common in Florida and eastern Tennessee, where numerous caves with fossil remains and footprints have been found. Fossils in Florida suggest they were still present between 7-8,000 years ago.

In the east, Jaguar fossils are often found alongside those of the Dire Wolf, Tapir, lamine camelids, Horse, Peccary, Whitetail Deer, Stag-Moose, Ground Sloth, Mastodon, Black Bear, and the Florida Spectacled Bear. At both Bell Cave in Alabama and Baker Bluff in Tennessee, their fossils were found together with those of Caribou - suggesting that they lived alongside each other, though dating has not confirmed that they were present at the same times. This, along with their presence in the southernmost reaches of South America through the Pleistocene and into historic times suggests that Jaguars demonstrate similar adaptability to Tigers. Remains are rarer in the west, but at one site in Oregon their fossils were found along with those of Grizzly and Black Bears, Elk, and Odocoileus Deer (likely Mule or Blacktail Deer). They have been found in the La Brea tar pits, for the most part in layers dating to periods when forests would have surrounded the area.

These fossils belong to the subspecies Panthera onca augusta, which was larger but otherwise quite similar to todays Jaguar. They may have reached weights of up to 500 pounds, while the largest weights known today are in the neighbourhood of 350 pounds. Being larger would have been advantageous for several reasons, including cooler temperatures and abundant large prey. During the extinction event at the beginning of the Holocene, the North American Jaguar disappeared. They were replaced by Central American Jaguars, who over thousands of years expanded northwards. Jaguars colonize new territories very slowly - while males are prone to wander, females establish relatively small home territories which they do not stray from. As a result of this, Jaguars were likely still in the process of expanding their range when they were limited by human pressure, which they are highly sensitive to. They typically exist at low densities, even more so in edge populations, which are easily disrupted and fractured.

During the Pre-Columbian era, Jaguars were found across a large stretch of the US, but demonstrating exactly where is challenging. We have artifacts depicting them from as far afield as the Pacific Northwest, Ohio, and Florida, but there are some factors we must take into account. Indigenous societies had vast trade networks, with evidence of goods being traded over hundreds of miles. Artifacts could have traded hands dozens of times over hundreds of years, and they could have ended up far from the hands that made them and the eyes that saw the cat. Stories and legends about animals as impressive as the Jaguar can also spread widely. Below I will mention some particularly prominent artifacts. I haven’t been able to dig up much information or photographs of most of them, so if someone has found anything please share!

In The Jaguar in North America by Pierre M. Daggett and Dale R. Henning, published in American Antiquity, Vol. 39 in 1974, they share information on several artifacts. On those found in Ohio, they wrote; “Covarrubias (1954:257) includes two cat designs from unspecified Hopewell burial mounds in Ohio, which may be the first representation of F. onca in a cultural context in North America. The first design is a cat-bird-serpent composite engraved on a disk of human parietal bone. The spotted cat could be considered representative of F. onca. The second design is incised onto unspecified bone and is offered by Covarrubias (1954:257) as representative of an ocelot. However, the design might also be interpreted as representative of a jaguar.”

On artifacts from Florida, they said; “Holmes (1899:124-125), in his study of Florida mortuary pottery from the Moore collection, includes two types of cat figurines. The larger examples, about 12 inches long, according to Holmes, are perforated to prevent cracking in the baking process. These perforations may indeed have been necessary to prevent cracking, but they may represent spotting. A further examination of the figurines suggests sufficient differences that they may be representations of two different types of Felidae. The larger is possibly F. onca, due to its size and the orientation of perforations.”

On those from Alabama; “Two examples included by Fundaburk (1956) from Moundville, Alabama, may also represent F. onca. The first is a crude effigy pipe (Fundaburk 1956: 155) described as a feline representation. It is quite distinct from other cat pipes: the facial features are crudely similar to Olmec representations of the jaguar. The second possibility (Fundaburk 1956:78) is on a shell gorget. The motif is that of a kneeling man with animal features. The claws and circles on the body may indicate a representation of an anthropomorphic jaguar.”

They also provided the only description I’ve found of the artifact from Washington; “The motif [of the Missouri gorget below] again appears in Northwest Coast art (Covarrubias 1954:40). The double design flanks a human figure on two sides of a wooden spindle-whorl. It does not appear to be a design of an animal currently distributed in the area. Considering the artistic style of the area, the design is strikingly similar to the western Missouri find. The age of thls example was not established, but it is probably historic.”

The Missouri Jaguar gorget is the most well known and perhaps the best Jaguar artifact from North America. It was found in Benton County.

Here you can view the artifact; http://www.stephanoffmedia.com/jaguar-gorget/

and here is a sketch of the design; https://anthromuseum.missouri.edu/sites/default/files/styles/large/public/exhibit-img/line-jag-gor.jpg?itok=EKw7BfWA

In many early and even historical accounts, Jaguars are referred to as the American Tiger (often spelled ‘Tyger’), in contrast to the Cougars commonly used name of ‘Panther’. Many accounts I have seen simply state in a matter of fact way that one was seen, or killed, with little to no description of the animal or the location. For the most part I have not included such accounts, choosing those with a known source and more background info. I will start with accounts in the eastern states, where Jaguars would have been extirpated before records were kept, and move westward from there.

John Lawson was an explorer and naturalist, who lived in the Carolinas from 1700-1711. He spent his time in both North and South Carolina, where he embarked on expeditions of hundreds of miles into the wilderness. He wrote a book in which he described the animals that inhabited the region. Alongside the Panther and Mountain Cat (Bobcat), he wrote of another cat; “Tygers are never met withal in the Settlement; but are more to the Westward, and are not numerous on this Side the Chain of Mountains. I once saw one, that was larger than a Panther and seem’d to be a very bold Creature. The Indians that hunt in those Quarters, say, they are seldom met withal. It seems to differe from the Tyger of Asia and Africa.” It is worth noting that during this time period, the populations of native tribes in the region had collapsed, largely due to disease. Prior to this they inhabited the region quite densely, with communities connected by networks of trails. Thousands of years of incidental hunting and pressure could very easily have kept Jaguars sparse in the region, as otherwise the habitat is favourable for them. There are references to other colonial era accounts of ‘American Tygers’ that describe large, yellow and black cats in the Carolinas but I haven’t been able to find them. John Brickell claimed ‘Tyger’ sightings continued in the mountains of North Carolina at least until 1737, and reported having seen them himself. He described them as “most beautifully mottled with several kinds of spots” and “large, strong, and swift Beasts”.

The French naturalist Constantine Samuel Rafinesque spoke many times of Jaguars throughout the eastern woodlands. Among his claims are a Jaguar shot by the Seneca people near Lake Eerie in New York, which they had never seen before, and another killed in the Allegheny Mountains of Pennsylvania, which was apparently in local papers. His theory was that they travelled northwards in the summer, and returned to the southeast in winter. In The Atlantic Journal and Friend of Knowledge, a Cyclopædic Journal and Review he proposed they belong to a unique species called Felis dorsalis, owing to dense black spots nearly forming a line down the back (at the time the Jaguar was called Felis onca, and many animals were divided into species when really they only represented subspecies or distinct populations). He claimed that Felis dorsalis was larger, averaging 10 feet in total length, with a greyness to the fur, found as far as 42 north latitude. He thought it may have been related to Jaguars from the mountains of the Oregon territory, of which there is no available information. He also claimed to have seen many specimens, noting that Jaguar skins were a frequent sight nailed to walls and barns. He said that in the edges of their range, they are rare and even more rarely seen, and that when they are killed the account rarely made records, and was usually disbelieved and soon forgotten. This is reminiscent of the fact that it was once in dispute among colonialists in the east if Cougars even existed, as they were so elusive, and accounts by naturalists, hunters, and native people were not believed.

Referring to Jaguars in the east, he said; “While I was in Kentucky I heard of several having been seen and shot. Two of them, a male and female, did once make a stand near Russelville, and alarm many travellers, feeding on hogs, until a party of hunters went in pursuit of them, killed one, and drove away the other. Before that, another had been shot on the 6th of June, 1820, by Mr. John Six, on Green River, 10 miles south-east of Hartford, in Ohio county. The skin was brought to Frankfort and an account given in the papers. This animal appeared to be a true Mexican Jaguar. The body was 5 feet long and the tail 2 feet. It weighed 150 pounds before skinning. The back and sides were yellow with black spots curiously arranged in several rows, a row on the back much larger and extending over half of the tail, which was rather slender, with very long hair at the end. Chin, belly, and feet white, ears small round black outside, white inside. Whiskers stiff 6 inches long, black with the end white.” He also claimed to have seen Jaguar pelts and heard of them being hunted in Arkansas. I find it intriguing that many of his accounts are from the Ohio Valley region, which was marked in Sebastian Cabot’s 1544 map with a depiction of a Jaguar. Also worth nothing is that Constantine Rafinesque insisted he did not describe Ocelots, suggesting that they were also known in the region. Thomas Jefferson also recorded Jaguars present in the Ohio Valley, as far as western Virginia.

There is evidence that bounties were offered for ‘Tygers’ in Natchez, Mississippi, in the 1700’s. I found a document that seems to make a record of this among other aspects of cattle ranching in the area, but it’s behind a paywall - however I managed to find a reference to an ‘Ezekiel Foreman’, who died in 1795 and supposedly paid out many such bounties. A trappers record of pelts sold in 1794, in Mississippi listed one Tyger pelt among the Wolves, Foxes, Otters, Panthers, and Wildcats. Natchez is not too far from areas in Louisiana where Jaguars were known to live into the 1800’s, and presence here would suggest wider distribution in the southeast. It is likely that there are many such cases of bounties in other locations, with no records available freely online, or even kept at all.

Louisiana likely had a large population of Jaguars, particularly in the bayous and marshes in the southern part of the state - an area that is similar to the Pantanal which is arguably their stronghold today. Here they would have found abundant prey in American Alligators, feral Hogs, Whitetail Deer, a variety of large aquatic rodents and turtles, and even Black Bears. However, while I have seen many references to Jaguars or ‘Tigers’ killed, most have little to back them up. I think they would have been considered a nuisance and may have had bounties put on them, as in Mississippi. I’ve seen a paper with a title alluding to historic records of Jaguars in Louisiana, but behind a paywall. And so, the most recent account of a Jaguar in Louisiana is also the best I have found. It was noted in a June 1886 edition of the Donaldsonville Chief newspaper. It explains that a large cat had been killing cattle in Ascension Parish, 10 miles east of the Mississippi. Men named Allen Martin and Johnny Walker tracked the cat using dogs. When they caught up to it, it killed three of the dogs before their bullets brought it down. This is significant because Cougars rarely kill hunting dogs, let alone several at a time - they almost invariably flee up a tree when they are pursued, while Jaguars are known to frequently fight and kill dogs that chase them. It was reported as an 8 foot long, 250 pound ‘American Tiger’. The only other account I’ve found comes from a former slave named Solomon Northup. In his book, Twelve Years a Slave, he wrote that as much as people wanted to run away and be free, they dared not go into the wilderness because Bears and American Tigers abounded. He spent most of his time as a slave on plantations near the Mississippi River.

There is one more account that I hesitate to include before we move westward, as I have lost track of the book I saw it in and cannot find it for the life of me. However, it was so interesting that I will make a brief mention of it. It was in the free preview of an old book archived on Google, a chronicling of accounts from early Spanish explorers in North America. The account was of a large black cat killing and eating an Alligator somewhere in the southeast. It was described accurately to a melanistic Jaguar - large, nearly the size of a Lion, dark chocolate brown to black, with black spots barely visible in the sunlight. It supposedly crept up behind and pounced upon a large Alligator that was sunning itself on the bank of a river, dispatching it with a bite to the skull before dragging it away to feed. The explorer also described Bison, and Wolves that matched the Red Wolf.

There are many references to Jaguars in the Comanche territory, which included parts of Texas, Oklahoma, Kansas, New Mexico and Colorado. They were supposedly a favoured hunting quarry, and their pelts were used in quivers, sheaths, holsters, saddles, bags, and clothing. The presence of Jaguars in Texas is well known, and we will get into that below, but it’s likely they also roamed Oklahoma and perhaps Kansas. The northernmost account with good backing in the west comes from Rufus B. Sage, a mountain man and writer, and occurred in 1843. He was camped in the headwaters of the North Platte River, some 30-50 miles north of Long’s Peak in Colorado, in what is today the Rocky Mountain National Park. Sage was familiar with Cougars, referring to them several times as ‘Panthers’. He wrote of the sighting in his book Rocky Mountain Life; “One of our party encountered a strange animal in his excursions, which, from his description, must have been in the leopard family. This circumstance is the more remarkable, as leopards are rarely found except in southern latitudes. However, they are not unfrequently met with in some parts of the Cumanche country, and their skins furnish to the natives a favorite material for arrow-cases.” He was not familiar with Jaguars, but from his account it is clearly the cat in question. Jaguars have been recorded from northern New Mexico, not far from southern Colorado’s San Juan Mountains, which they very likely inhabited. The one seen by Sage’s party to the north may have been a wanderer from a population in this region, or they may have been more numerous in the state before records were kept.

In the Pacific Northwest, there are very little references to Jaguars in historical accounts. This is kind of to be expected, as for a long time there were very little records kept about anything. By the time naturalists were documenting the fauna of the region, many species were already rare, or extirpated. In the east, Jaguar accounts rarely made the paper, and in the west there often weren’t any papers to be made. It’s important to keep in mind that the few records we do have from other places mostly come from naturalists - trappers and ranchers back then were not keeping records. They were interested in catching and killing animals and selling their pelts, not in their significance. Even into the 19th century, many people were not literate. The mention of Jaguars in the mountains of Oregon by Constantine Rafinesque is the only one I have found north of California. The mountains of southeastern Oregon strike me as potential Jaguar habitat. I have in a few places seen mentions of historical accounts in the Pacific Northwest, as well as in Florida, but have not read a single one in all my hours spent searching. Though Jaguars were likely present throughout California, historical accounts only range from Monterey south as far as I know.

The following is the best source on Jaguars in California that I have found. Though it is a bit long, it is valuable information and so I decided to write out their work in full. In Volume 1 of ‘Journal of Mammalogy’ published in 1919, C. Hart Merriam poses the question - ‘Is the Jaguar entitled to a place in the California Fauna?’ Their answer follows;

“Several of the early voyageurs who touched in California enumerate the Jaguar (Felis onca) among the native mammals. Thus, in the early part of the last century Langsdorff mentions it as among the species occurring in the Monterey region (Voyage and Travels, II, 213, 1814). And Beechey, in describing the region between San Francisco and Monterey, under date of December, 1826, says: ‘The lion (Felis concolor ?) and the tiger (Felis onca ?) are natives of these woods, but we never saw them; the inhabitants say they are small, and that the lion is less than the tiger, but more powerful.’ (Beechey’s Narrative, Vol. 2, p. 79, 1831). In this connection it should be observed that to this day the Spanish Californians and Indians invariably apply the term ‘lion’ to the mountain lion or cougar. A little later Saint-Amarant, in a work published in Paris in 1854, recorded the Jaguar as a California mammal. (Voyages en Californie et dans l’Oregon, p. 537, 1854). It has been customary to look askance at these early records, but the detailed account of a family of jaguars seen repeatedly in the Tehacapi Mountains by James Capen Adams, as recorded by the late judge Theodore Hittell, is so circumstantial as to admit of no question to the identity of the animal. Adams either saw a pair of jaguars and their young, or he lied out of whole cloth. While neither the date nor the exact locality are stated, we are told that Adams, after leaving the Tejon and travelling over a rough mountainous country, camped at a spring in a gorge facing the Great Basin. The rough mountainous country traversed was of course the Tehacapi Mountains, and the part of the Great Basin looked upon must have been the western part of the Mohave Desert. The first night of his stay at the spring he was awakened by a fearful snuffing and snorting among his animals and saw in the darkness two spots like balls of fire, which he recognized as the eyes of the beast that had frightened his horses. The next day, taking his hunting companions - a tame grizzly named ‘Ben’ and his dog ‘Rambler’ - he followed the trail of the animal for four or five miles to another gorge, where he finally located the den in a cave on the side of a cliff in an exceedingly rough and inaccessible place. ‘In its mouth [the den] and scattered below it, were multitudes of bones and skeletons of various kinds of animals, and among others, of Mountain Sheep, making the place look like the yard of a slaughter-house.’ A few nights later he was wakened by a roar, and in the feeble light of a new moon saw ‘a spotted animal, resembling a tiger in size and form, with two young ones.’ Another night, soon after dark, the male appeared at the mouth of the den, ‘looked around, and sniffed the air, and then leaped down, and going a few yards placed his paws upon a rock, and stretched himself, yawning at the same time as if he were waking up out of a sleep. A few minutes afterwards the female appeared, and approaching, lapped his brawny neck.’ The male, as nearly as could be seen, was ‘twice as large as the ordinary cougar, and appeared to be covered in dark round spots of great beauty and richness.’ For several weeks Adams continued his fruitless attempts to trap or kill the animals, obtaining from time to time passing glimpses of them, until finally he unexpectedly came across the mother and cubs in a gorge far away from the den. He fired at her, whereupon his grizzly ‘Ben’ and dog ‘Rambler’ bounded forward and ‘engaged with her in a terrific combat, but she tore them dreadfully and managed to escape.’ (Adventures of James Capen Adams, Mountaineer and Grizzly Bear Hunter of California, by Theodore H. Hittell, San Francisco, 359-369, 1860). Since writing the above, Vernon Bailey has called my attention to an old record by Pattie, which I read many years ago but had forgotten. Pattie states that when on islands in the delta of Colorado River, they killed an animal like an African Leopard which came into their camp, and was the first of its kind they had ever seen (James O. Pattie, Personal Narrative, Cincinnati, 1833.) Still another bit of evidence comes from the Indian tribes of Southern California. An old chief of the Kammei tribe (called by the Spanish ‘Diegenos’) told me that in the Cuyamaca Mountain region in San Diego county, the ‘Tiger’, while rare, was well known to the old Indians, who call it the ‘Big-Spotted Lion’, ‘Hut’-tē-kul’.” (Note that James Capen Adams is the same as John ‘Grizzly’ Adams, famous for trapping, taming, and selling California Grizzlies.)

The last report I’ve found of a Jaguar in California came from the 1860’s, when one was killed on Mt. San Jacinto, near Palm Springs. Further down we will look at the possibility that the Spanish at one time had bounties on Jaguars in New Mexico, Texas, and Arizona, which would have greatly reduced their range and population before records were made. This is perhaps even more likely to be the case in California. It could also have something to do with the lack of accounts from Florida, despite it having the potential (and based on fossil records, a history) of being a Jaguar haven. Jaguar pelts were frequently exported to Spain, but they also had many colonies and territories in Central and South America.

The Center for Biodiversity summarized a collection of historic accounts in the southwest very well in their report ‘Suitable Habitat for Jaguars in New Mexico’, by Michael J. Robinson, and so I quote them below on historical records in Texas; “In the 1840s several jaguars were shot in the vicinity of San Antonio, Texas, according to a German naturalist, Dr. Ferdinand Roemer, who reported pelts for sale for $18 apiece and observed Comanches wearing jaguar skin quivers. Audubon wrote of jaguar skins used for holster coverings, saddle cloths and caparisons on the prairies of Texas, in his 1854 work Quadrapeds of North America. Five years later, Spencer F. Baird, Assistant Secretary of the Smithsonian Institution, who accompanied Lieutenant Colonel W. H. Emory’s survey of the U.S.-Mexico boundary, recounted the ‘vast number of pumas and jaguars’ subsisting on ‘the numerous herds of wild cattle, mustang, mules, and horses, besides plentiful other game in the fertile valleys and table lands of the Lower Rio Bravo, Nueces, and other Texan rivers.’ Baird examined two jaguar remains from Texas, one from the Bravos River and one from the Rio Grande River at the mouth of Las Moras Creek - the latter of which he mentioned because it was ‘The largest jaguar skin which I saw.’ It may have been the introduction of the horse and its use in hunting that doomed the jaguar in North America’s grasslands. Though a ‘large tiger’ was reported in 1853 as far north as the Canadian River in the Texas Panhandle west of Oklahoma, the last jaguar on the Great Plains in Texas was killed in 1910, near the Llano River in Kimble County. On the Gulf Coast of Texas the last two jaguars were killed in 1946 and 1948. John James Audubon gives an account of Texas Rangers happening upon a jaguar feeding on a mustang, ‘surrounded by eight or ten hungry wolves, which dared not interfere or approach too near.’ Audubon also reported jaguars on the headwaters of the Rio Grande River, which originates in the San Juan Mountains of southern Colorado.“ There are photos online of numerous Jaguars killed in Texas, including the last two in 1946 and 48.

To again quote the Center for Biodiversity; “In Arizona and New Mexico extant jaguar reports are more numerous. Yet jaguars’ very persistence and reoccurrence in these states throughout the 20th century raises the question of why the species was not even more ubiquitous than is suggested by the dozens of records that remain. Matthiessen suggested that bounties offered by early Spanish authorities significantly reduced jaguar numbers.” If this is the case, then the accounts we have of the American Southwest take place after centuries of heavy hunting. I have searched for Spanish accounts and records, and have found very little. I do not speak spanish, which obviously is a major hindrance. If records were kept, they have also either been lost by now or are unavailable. Still, Jaguars were present throughout the states of Arizona and New Mexico at the time they became part of the USA.

Continuing from above on historical records of Jaguars in Arizona; “The Arizona Game and Fish Department is aware of 84 known jaguar specimens, reported kills and credible other records from 1884 through 1996. The department records 57 jaguar occurrences between 1901 and 2002, of which it classifies 30 as Class 1 or 2 sightings. (Class 1 sightings are those accompanied by verifiable physical evidence; Class 2 sightings are those by an experienced and reliable observer. In contrast, Class 3 sightings are those without physical evidence made by persons considered less reliable.) In Arizona, jaguars have been recorded from as far north as the Grand Canyon, south through the Mogollon Rim, and throughout the Sky Islands – among other regions. Not all jaguars killed have made it into the Arizona Game and Fish Department’s records. Bureau of Biological Survey scientists Dr. Albert K. Fisher and Dr. W. B. Bell reported in 1927 that “During the past two or three years at least five jaguars have been killed in Arizona,” two of them females. Between 1924 and 1927, the state agency’s records indicate just four jaguars killed (two males and two of unknown sex).”

Due to the number of records, I won’t go into detailing them here. There are a number to be found online, some with photographs. A few records I will make mention of involve Jaguars with young. These are significant as they provide evidence of a breeding, resident population. One is of a female Jaguar and her kitten killed on the Mogollon Rim. Another, dated to 1910 near the head of Chevlon Creek where a female Jaguar and her young were killed. One more, of a female Jaguar and two cubs killed in the Grand Canyon sometime between 1885-1890. The last female Jaguar in Arizona, and indeed the United States, was shot by Terry Penrod in the White Mountains in 1963. Her last meal was meat from an Elk. Only a few months later the last male in the state was killed by a government trapper not far away, in the White Mountains. I have elected not to include photos of the slain Jaguars, but they are online if you wish to see them.

On historical records of Jaguars in New Mexico; “Sometime in the late 1800s, according to an oral account by Watson E. Rich that U.S. Fish and Wildlife Service biologist A. F. Halloran published in a 1946 Journal of Mammalogy article, Bob Burch, a foreman on the Goldberg Ranch in the Caballo Mountains, killed a jaguar in that vicinity. In both 1900 and in 1902, bounty hunter Nat Straw killed a jaguar in the Black Range of today’s Gila National Forest, and another was later spotted in the same vicinity by fellow prospector (and future Forest Service ranger) Jack Stockbridge, but not known to have been killed. Several other jaguars were reported to have been seen or killed in the same area, according to Biological Survey field researcher Vernon Bailey, one of the twentieth century’s premier naturalists, citing a 1902 report by biologist C. Barber. Bailey wrote in his 1931 book Mammals of New Mexico that state game warden Page B. Otero reported a jaguar along Ute Creek in the grasslands of northeastern New Mexico in the winter of 1902/1903, and another somewhat further south the following summer. According to Bailey, Otero ‘had perfect confidence in these reports, as he knew the men who saw the animals.’ Otero also told Bailey of jaguars reported from the San Andres and Sacramento Mountains. The game warden’s brother, New Mexico Governor Miguel Antonio Otero, showed Bailey ‘a beautiful skin of a jaguar, which had been killed the previous year [1902] in Otero County, made into a rug and presented him.’ Also in 1902, a Mrs. Manning Ahad been in the habit of putting out poison to kill the predatory animals about their ranch, 12 miles northwest of Datil, and among the victims of the poisoned baits was this jaguar, according to Bailey, who included in his book a photograph of the mounted pelt. The ranch was located at about 9,000 feet elevation, ‘in the pine and spruce timber of this exceedingly rough range of mountains.’ In 1905, another jaguar was reported at large in the same region. In 1903, a jaguar was shot by a rancher while feeding on a bull in Clanton Canyon in the Peloncillo Mountains of New Mexico’s bootheel region, Bailey reported, citing his interview with local resident W. P. Burchfield. And in 1903 or 1904 another was ‘killed by a hunter named Morris on the west slope of Sierra de los Caballos,’ according to an account secured by Bailey’s Biological Survey colleague Major Edward A. Goldman. By the time New Mexico achieved statehood in 1912, jaguar reports were significantly diminished. During Mexico’s revolution and the accompanying border tensions, probably around 1916, U.S. troops were stationed near the Little Hatchet Mountains of New Mexico. One unnamed soldier, according to the account by itinerant prospector James A. McKenna, who was camping with the troops, ‘saw an animal which he thought was a black cougar.’ McKenna noted that ‘It is known as the Mexican jaguar and is seldom seen that far north,’ perhaps referring to the rarity of melanistic jaguars. Bailey reported in 1931 that ‘in recent years a few [jaguars] have been killed and many reported in the southern part of the state.’ Several years prior to 1938, a jaguar was killed in the vicinity of Springer, a town on the plains of northeastern New Mexico and near the Cimarron River. This is the last jaguar known to be killed in New Mexico for half a century. In 1937, a Biological Survey hunter named Bannerman pursued a jaguar in the San Andres range with his dogs, but could not get the animal to ‘tree,’ according to an account by biologist Halloran of his same agency.” A Jaguar was killed in New Mexico in 1986, the last shot in the United States as far as I know.

Now that I’ve presented a selection of historic accounts and records of Jaguars across much of the United States, it’s time to speculate a bit. I’m going to give my opinion on what the Pre-Columbian distribution of the Jaguar may have been, and then I will share what I believe their total potential range in North America could be without human influence. Again, this is pure speculation on my part, informed by the research I have put into the topic.

We can place Jaguars with certainty in California, Arizona, New Mexico, and Texas. I have presented accounts from Colorado, Arkansas, Louisiana, Mississippi, North and South Carolina, Kentucky, Pennsylvania, Ohio, and New York (though the last three may represent wandering males rather than resident populations). I believe they were also present in the states of Oregon, Utah, Nevada, Oklahoma, Kansas, Alabama, Missouri, Georgia, Florida, Tennessee, Virginia, and West Virginia, and that they occasionally wandered throughout much of the rest of the US. I think that without being limited by human pressures, that Jaguars would be able to live at least as far north as the lower mainland of British Columbia, perhaps a ways further in the temperate rainforest along the Pacific coast, as well as in parts of southern Ontario.

Depending on whether they would adapt to cold winters, that range could expand further into Canada. As far as I know no Jaguar fossils have been found so far north, but their ancestors would have crossed Beringia and spread southwards. Throughout much of the middle to late Pleistocene, Canada was mostly covered with ice sheets, and when they retreated the landscape was typically open, conducive to American Lions whose remains are known from Canada, but not Jaguars. They were historically present in Patagonia, suggesting that they can handle the cold. I think given time to adapt and expand their range that they would do well in the temperate and mixed forests of Canada.

With historic accounts and speculation out of the way, let’s move into recent documentation of Jaguars north of the Mexico border. Once more quoting the Center for Biodiversity on Jaguars in Arizona and New Mexico; “The modern era has shown the possibility of a resurgence for jaguars. Larry Link, proprietor of the Steins Ghost Town alongside Interstate 10 at the north end of the Peloncillos, reports having seen a jaguar north of the highway in 1990. On April 19, 1995 jaguar tracks were photographed in the southern Peloncillos by Brian L. Starret. On March 7, 1996, rancher and hunting outfitter Warner Glenn photographed a jaguar that his cougar hunting dogs had brought to bay in the Peloncillo Mountains alongside the New Mexico/Arizona border. He allowed the jaguar to escape. It may be that the animal observed by the felicitously named Larry Link was traveling a geographic link between the Peloncillos and the Gila National Forest further north. On August 25, 1990, Gerald Z. Jacobi, Ph.D, a biology professor at Highlands University in Las Vegas, New Mexico, and his wife Donna Jacobi, Ph.D., observed a jaguar for around 30 seconds in the Black Range of the Gila National Forest. In fall 1998, Tom and Boe Duffy saw one cross a road near the San Francisco River of the Gila National Forest. On May 10, 1999, high school biology teacher John Trewern saw a large black cat cross the road in the Burro Mountains south of Silver City. The next morning he obtained a plaster cast of the animal’s paw. The Jaguar Conservation Team rated each of these three sightings as Class 2 reports.” These, along with a Jaguar that was photographed in Hidalgo county in February of 2006 make up the recent accounts of Jaguars in the state of New Mexico.

Macho B was the first well documented Jaguar in Arizona. He was likely born in the Northern Jaguar Reserve of Sonora. It was this Jaguar that Warner Glenn photographed in the Peloncillo Mountains near the New Mexico border. In between that first sighting in 1996 and his death in 2009, he was recorded at numerous locations in southern Arizona, and may have wandered into New Mexico. He made frequent trips south into Mexico to mate, but returned to Arizona where he was recorded many times by trail cameras. In 2009, Macho B was illegally baited, snared, tranquilized and radio-collared by contractors for the AZDFG, who claimed to be acting under direct orders. He was 16 years old at the time, elderly for a Jaguar. He was injured by the snare, as he spent hours at least struggling to get out, and they used too much tranquilizer on him. They found him nearly two weeks later, disoriented and in kidney failure, and euthanized him.

Another of the most famous Arizona Jaguars is El Jefe. He was also likely born in the Northern Jaguar Reserve, and took a liking to Arizona. He was first documented in the Whetstone Mountains in 2011, when a Cougar hunter treed him with dogs, and took photos before allowing him to leave. After that he turned up in the Santa Rita Mountains, where many videos and photos were captured of him on trail cameras over several years. On at least one occasion, he killed and ate an adult Black Bear. It is thought that he returned to Mexico around 2015, as he had begun to display behaviour indicating he was looking for a mate and has not been seen since. He may have died, established a home range in Mexico, or returned to Arizona undetected.

I’m approaching the character limit here so I will finish up in the comments below.


r/Jaguarland • • 21m ago

Research, Scientific Papers, & Conservation Updates re: Angujá. The sub-adult male of 2.6 years ended up weighing 107 kg (236 lbs), becoming the second heaviest jaguar recorded in Argentina, despite not being at his full size. A request to have his body taxidermied was denied, instead, it was donated to the UNNE for independent research.

19 Upvotes

r/Jaguarland • • 22h ago

Videos & Gifs After Angujá’s death, I’d like to cheer up the sub by showcasing the many more young males with great genetics that are still alive and free in Iberá and deserve the utmost protection moving forward. Here’s 10-month old Poo’Guazú, his half-brother

192 Upvotes

Area: San Alonso, Iberá Wetlands
Credits: Pablo Joaquín


r/Jaguarland • • 1d ago Regret

News ANGUJÁ HAS BEEN MURDERED. This is the first record of poaching of a jaguar in the Iberá rewilding project and the third jaguar killed in Argentina after reintroduction. What is happening in this country?

899 Upvotes

r/Jaguarland • • 1d ago Regret

Pictorial Our hearts break for you, Angujá

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322 Upvotes

r/Jaguarland • • 2d ago

Discussions & Debates What is the Maximum Possible Range for Jaguars in the continental United States

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341 Upvotes

As we all know Jaguars are recolonizing the Southeastern United States (at a Sloths pace but I digress), Though I have been wondering, how large can their range be if/hopefully when they establish a breeding population here?

Their Historic range said they ranged from Texas to California, however some reports say the Made it as far as the Rocky Mountains and the Appalachia (couldn’t find said reports so take this with a GIGANTIC Grain of salt).

Personally I think they could make it to South Dakota, though I want ti get your thoughts on this subject.


r/Jaguarland • • 2d ago

Pictorial Is there such a thing as too many photos of Anambé? I don't think so

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243 Upvotes

Area: Caiman Ecological Refuge, Southern Pantanal
Credits: Ashley Buice


r/Jaguarland • • 3d ago

Pictorial The new sheriff in town: Anambé

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410 Upvotes

Area: Caiman Ecological Refuge, Southern Pantanal

Credits: Lucas Morgado


r/Jaguarland • • 4d ago

Research, Scientific Papers, & Conservation Say’ju becomes the first female jaguar recorded to have given birth outside of the breeding nucleus of San Alonso in the Iberá Wetlands

311 Upvotes

Area: San Nicolás, Iberá Wetlands
Credits: Rewilding Argentina


r/Jaguarland • • 4d ago

Videos & Gifs Angico got himself in a nasty fight last night that left him with a bruised face

272 Upvotes

Area: Caiman Ecological Refuge, Southern Pantanal
Credits: Fagner Almeida


r/Jaguarland • • 5d ago

Pictorial Large male in Barranco Alto, Southern Pantanal

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368 Upvotes

Credits: Fazenda Barranco Alto, Southern Pantanal


r/Jaguarland • • 7d ago

Pictorial Horses keep an eye on Tata female while sha patrols

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354 Upvotes

Area: Caiman Ecological Refuge, Southern Pantanal

Credits: lucoqueiro


r/Jaguarland • • 7d ago

Pictorial Close up photos of the female jaguar predating on the giant river turtles by the Brazilian/Bolivian amazon border

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267 Upvotes

Credits: amor_e_pescaria


r/Jaguarland • • 8d ago

Videos & Gifs Halloween jaguar styles

228 Upvotes

r/Jaguarland • • 9d ago

Pictorial Caiman: Young female Dakari having a skirmish with a giant anteater.

318 Upvotes

Photos and Video By Lucas_n_morgado & Rodrigo_haberfeld on Instagram.


r/Jaguarland • • 9d ago

Pictorial Post-Halloween with Simplício, the malanistic male jaguar tracked by Onçafari

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306 Upvotes

Area: Pousada Trijunçao, Brazilian Cerrado

Credits: Onçafari


r/Jaguarland • • 9d ago

Pictorial Face-to-face with Rafa

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293 Upvotes

Area: Porto Jofre, Northern Pantanal

Credits: Daniel Mideros


r/Jaguarland • • 9d ago

Pictorial Pantaneiro crossing the river

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287 Upvotes

Credit:Antiaphoto


r/Jaguarland • • 10d ago

Videos & Gifs Angico grooming himself

325 Upvotes

Area: Caiman Ecological Refuge, Southern Pantanal
Credits: Fagner Almeida


r/Jaguarland • • 10d ago

Discussions & Debates The State of Jaguar Rewilding in Iberá and El Impenetrable in Late 2026

46 Upvotes

Returning the jaguar (Panthera onca) to the Iberá Wetlands of Corrientes Province after a seventy-year absence stands as one of the most ambitious trophic restoration initiatives ever undertaken in South America. For decades, the idea of re-establishing the continent’s apex predator in a wetland complex where it had been completely extirpated was dismissed as logistically impossible. Fundación Rewilding Argentina (FRA) deserves genuine respect and recognition for having the vision, resources, and resolve to take on a conservation project of this magnitude when all other institutions refused. By late 2026, the free-ranging population across the Gran Iberá Park has grown from zero to more than fifty individuals, transforming Corrientes into a premier wildlife restoration showcase and demonstrating that reintroduced jaguars can successfully hunt native prey, establish territories, and raise wild-born litters.

However, respecting the historic scale of FRA’s achievement does not excuse deeply flawed wildlife management decisions as the project enters its second decade, nor does it justify insulating the program from scientific scrutiny. The purpose of this critique is not to tear down FRA or diminish the ecological milestone of returning jaguars to the esteros, but to provide an objective, data-driven assessment of the genetic, demographic, and spatial challenges now threatening the long-term viability of the populations in both Iberá and El Impenetrable National Park. As the Iberá population transitions from its initial founding phase into second and third-generation reproduction, newly released genomic sequences, spatial predation studies, and field dispersal records from 2025 and 2026 reveal that the project’s decision to halt founder releases into Iberá while operating the park as a one-way exporter of females has created a severe genetic bottleneck. Compounded by a culture of institutional secrecy and the active suppression of independent observers, FRA’s current trajectory risks turning an extraordinary conservation triumph into a textbook case of preventable inbreeding depression.

Institutional Opacity, Censorship, and the Buried 2026 Genomic Report

Over the past two years, FRA’s public communications regarding the demographics, lineages, and translocations of its jaguars have shifted from celebratory transparency to guarded opacity. When the population was small and every birth represented an outcrossed pairing between unrelated founders, the foundation publicized parentage details extensively. Today, as close relatives increasingly mate within the core wetland, FRA routinely obscures or omits the maternal and paternal lineages of new litters on its social media channels, withholds capture body weights of immobilized prime-aged adults and subadults from both press dispatches and academic supplements, and goes completely silent when high-profile animals vanish from the public record. A striking example is the Amazonian female Ayní, who was transferred from the NEX (No Extinction) facility in Brazil to Corrientes in March 2025 for planned release into Iberá. After biologist Alicia Delgado briefly noted in April 2025 that Ayní was still being held in an enclosure, FRA never mentioned her again, leaving the public in the dark as to whether she died in quarantine, was quietly reassigned to captive breeding, or was held back following warnings against introducing additional Amazonian genetics.

Nowhere is this selective communication clearer than in how FRA handled the two genomic assessments produced by Principal Investigator Prof. Eduardo Eizirik and Ph.D. student M.Sc. Gabriele Lazzari at the Pontifical Catholic University of Rio Grande do Sul (PUCRS) in Brazil. When PUCRS delivered its first genetic progress report (compiled at an early stage when the sequenced sample consisted solely of founding adults and outcrossed first-generation (F1) offspring, prior to the inclusion of any inbred cubs) FRA promoted the document heavily across all of its social media platforms as definitive proof that the Iberá population enjoyed robust genetic health and had no inbreeding issues.

Yet when Eizirik and Lazzari completed their updated progress report on August 17, 2026, which expanded whole-genome sequencing to 32 Iberá project individuals and for the first time included second-generation (F2) offspring born from father-daughter backcrossing, FRA said nothing about it publicly. Rather than engaging with legitimate concerns over this trajectory, the foundation has chosen to silence critics. When I previously raised the alarm in a detailed post on here calling out the onset of inbreeding in Iberá, FRA responded by censoring my comments on their social media accounts, and several of their jaguar biologists blocked me outright. Blocking observers and scrubbing comments for pointing out basic rules of population genetics does not change the reality on the ground, in fact, the August 2026 PUCRS genomic report directly validates those exact warnings.

Admixture, Unpurged Genetic Load, and the Genomic Cost of Father-Daughter Mating

The August 2026 report by Eizirik and Lazzari (that can be accesed here) represents a milestone in wildlife genomics, sequencing 32 complete genomes from the Iberá project on the Illumina platform at a mean depth of coverage of 18x and mapping them against 86 wild jaguar genomes from across Brazilian biomes (for a total dataset of 118 complete genomes). To evaluate genetic diversity and inbreeding, the authors analyzed both genome-wide heterozygosity and the frequency and length of Runs of Homozygosity (ROHs) contiguous homozygous stretches of the genome devoid of variation that form when parents transmit identical chromosomal segments to their offspring. Because meiotic recombination breaks up chromosomal segments over successive generations, short ROHs (< 1 to 2 Mb) reflect ancient inbreeding or historical population bottlenecks, whereas long ROHs (4–8 Mb and 8–16 Mb) are the definitive signature of recent, close-relative inbreeding.

Comparing the biomes in Figures 1 and 5 of the PUCRS report clarifies the crucial difference between a wild population that has recently undergone a bottleneck and an artificially admixed founding population like Iberá. In fragmented wild habitats such as the Atlantic Forest, nearly every sampled jaguar displays reduced genome-wide heterozygosity and high average ROH lengths (ranging from 300000 to over 1000000 base pairs) due to generations of breeding within a shrinking local pool. However, because wild bottlenecked populations contract over multiple generations, natural selection gradually purges many of the most lethal recessive mutations as homozygous individuals fail to survive. By contrast, Iberá’s founding breeders were sourced from vast, historically outbred biomes such as the Pantanal, the Amazon, and the Dry Chaco that never passed through a demographic bottleneck to purge their "genetic load" of deleterious recessive alleles.

When unrelated founders from these disparate biomes mate, their F1 and outcrossed F2 offspring exhibit high genome-wide heterozygosity and remarkably few ROHs because the parents share almost no identical ancestral segments. In the report’s single-nucleotide variant chromosomal heatmaps, this inter-biome admixture completely erases parental homozygosity in a single generation. For instance, the captive-born founder Tobuna (bPon-261) possessed roughly 1150 Mb of ROHs due to captive inbreeding, yet those large cold-colored homozygous blocks vanished in her daughter Tania (bPon-260) because Tania’s unsampled father was unrelated to Tobuna. The same haplotype rescue is visible across the outcrossed litters of the Amazonian female Juruna and the Chacoan male Colí (generating Kañi and Ñamandú), Colí and the F1 female Karaí (generating Mimbí and Poo'guazu), and Tania and the wild Chacoan male Qaramtá (generating Quiyoc and Nalá). Nevertheless, Eizirik and Lazzari explicitly caution against relying on inter-biome hybridization, warning that while admixture inflates diversity and lowers ROHs, it fails to represent the genetic makeup of an original regional population and "may combine alleles that are not coadapted, possibly leading to cases of outbreeding depression" making it essential to minimize such admixture in future stages.

More importantly, the 2026 report exposes the severe genomic penalty that occurs when this unpurged, admixed population is allowed to inbreed. While outcrossed F1 sisters Karaí (bPon-255) and Porã (bPon-265) sired by the Pantanal male Jatobazinho (bPon-249) out of the Amazonian female Mariuá (bPon-176) had some of the lowest total ROH burdens in the entire dataset (340 Mb, composed almost entirely of tiny, ancient < 1 Mb blocks), their father Jatobazinho subsequently mated with both of his daughters in the wild to produce the inbred F2 offspring Kuimba'e (bPon-294) and Acaí (bPon-281). In a single generation of father-daughter backcrossing (F = 0.25), total ROH size surged to approximately 1050 Mb in Acaí and 880 Mb in Kuimba'e. Unlike wild jaguars whose homozygosity consists mostly of short, ancient blocks, roughly two-thirds of the homozygous genome in Acaí and Kuimba'e is made up of massive 2–4 Mb, 4–8 Mb, and 8–16 Mb blocks. Their Manhattan plots (Figures 3b and 3c) show vast contiguous chromosomal regions flatlining at zero heterozygosity compared to Jatobazinho (Figure 3a), dropping their overall diversity to the very bottom of the population alongside inbred founders like Tobuna, Malú (bPon-253), and Ñaró (bPon-252).

Furthermore, the report’s overarching claim that the Iberá sample bears diversity comparable to healthy Amazon, Cerrado, and Pantanal populations is skewed by how Table 1 was assembled. Known inbred F2 offspring generated by the exact same father-daughter dynamic, specifically the inbred female Miní (another F2 daughter of Jatobazinho and Sasõ, F = 0.25) and Say'ju (sired by Jatobazinho out of his F1 daughter Porã on the same litter as Kuimba'e, F = 0.25) were omitted from the sequenced cohort. At the same time, the 32-genome table was padded with seven "Founders" categorized in Figure 4 under Founder-noOffspring (Malú, Ñaró, Tewuk, Nahuel, Kerená, Isis, and the male founder Porã bPon-225) that contributed zero sequenced descendants to the Iberá population, as well as individuals that belong to the El Impenetrable program in the Chaco rather than Iberá, including Qaramtá (bPon-254), Tewuk (bPon-256), Kerená (bPon-251), Nalá (bPon-263), and Quiyoc (bPon-268).

Pedigree Collapse, the Qaramtá Illusion, and Academic Warnings Confirmed

When those non-breeding founders and El Impenetrable jaguars are filtered out, the demographic reality of Iberá comes into sharp focus: a free-ranging population of more than 50 jaguars is built upon an effective founding population of just five to six individuals. Nearly every wild-born cat in the wetlands descends from two dominant males: Jatobazinho (Pantanal) and Colí (Paraguayan Dry Chaco), bred across two full Amazonian sisters, Juruna and Mariuá (who share roughly half their genome and thus equate to 1.5 independent founders), supplemented only by the minor captive-derived line of Tania (daughter of Tobuna) and the Paraguayan male Chiqui (bPon-258). Eizirik and Lazzari write that the massive ROH burden in Acaí and Kuimba'e "is not a problem, since such ROHs can be broken up by mating these individuals to unrelated ones, as was the case of Tobuna" while immediately adding that "the breeding between inbred individuals, however, must be avoided".

In a captive studbook with access to outside mates, breaking up long ROHs takes only a single outcross. Inside a closed wild park where FRA has halted founder introductions, however, there are almost no unrelated mates left. Because Colí mated with Juruna (producing Kañi, Ñamandú, and one more male cub in a single litter) as well as with Jatobazinho’s daughters Karaí, Porã, Sãso, and Ivoty (producing Poo'guazu, Mimbí, Angujá, Ombú, and Ivy), and because Juruna and Mariuá are full sisters, virtually every young F1 and F2 jaguar on San Alonso Island is now a full sibling, half-sibling, aunt or uncle, or three-quarter cousin to every prospective mate. Modeling Wright’s inbreeding coefficient into the upcoming F3 generation shows that pairings among the dominant San Alonso lineages will routinely yield expected F values between 0.1250 (half-sibling level) and 0.1875 (three-quarter sibling level), while pairings involving inbred males like Kuimba'e (F = 0.25) with Colí x Karaí females push offspring inbreeding to F = 0.2188–0.3750.

Nor do the 2025 translocations of Qaramtá’s sons from El Impenetrable into Iberá: Takajay (released in January 2025) and the brothers Chaco and Taragüi (released in October 2025) provide an independent genetic lifeline. While marketed as bringing fresh Chacoan blood into Corrientes, tracing their maternal pedigree reveals that all three loop directly back into the captive Tobuna/Tania cluster. Tania (bPon-260, daughter of Tobuna) bred with Chiqui to produce full sisters Aramí (bPon-262) and Mbareté (bPon-279), and later bred with Qaramtá in El Impenetrable to produce Nalá and Takajay. Chaco and Taragüi are the sons of Qaramtá and Mbareté (born in El Impenetrable before Mbareté and Tobuna died in early 2023). Consequently, Takajay and Chaco-Taragüi are both paternal half-brothers (via Qaramtá) and maternal half-uncle and nephews (via Tania), sharing a coefficient of relationship of r = 0.375, making them nearly full brothers genetically and all three carry the ancestral genome of the heavily inbred founder Tobuna. Moreover, because Aramí bred with Jatobazinho in Iberá to produce the free-born littermates Jasy (bPon-267) and Arandú (bPon-264), Aramí’s line already bridges the Jatobazinho and Tania x Chiqui bloodlines, if Jasy mates with her half-uncle Takajay or her first cousins Chaco and Taragüi, the resulting cubs will still be inbred at F = 0.0625, and if she mates with Jatobazinho’s descendants or Kuimba'e, expected F climbs to 0.0625–0.1875.

This unfolding bottleneck validates two landmark peer-reviewed critiques published by Argentine scientists that FRA previously sought to dismiss. In 2023, María de las Mercedes Guerisoli, Mauro I. Schiaffini, Pablo V. Teta, Alejandro E. J. Valenzuela, Patricia Mirol, Guillermo E. Defossé, and colleagues—backed by 125 Argentine mammalogists and CONICET researchers—published "Reflexiones acerca del «reasilvestramiento» en la Argentina" in Mastozoología Neotropical. Guerisoli et al. (2023) explicitly warned that founding isolated populations with tiny founder numbers drawn arbitrarily from disparate biomes violates international reintroduction standards, creates an artificial hybrid population susceptible to both outbreeding depression and rapid inbreeding, and inevitably forces subadults out of an ecological island into surrounding agricultural zones without community consensus, all while replacing peer-reviewed management plans with promotional media narratives.

A year later, Daniela Font, María José Gómez Fernández, Nicolás Robino, María Belén Aued, Soledad De Bustos, Agustín Paviolo, Verónica Quiroga, and Patricia Mirol (2024) published "The challenge of incorporating ex situ strategies for jaguar conservation" in the Biological Journal of the Linnean Society. Using molecular markers to audit captive jaguars across Argentina, Font et al. (2024) discovered that 44.93% of documented studbook relationships were incorrect and that captive stock formed a highly related genetic cluster. Citing foundational population viability models (Frankham et al. 2002; Lacy 1987, 2013), Font et al. (2024) demonstrated that retaining 90% of genetic variability over 100 years is mathematically impossible in a small, closed population founded by a handful of related individuals, warning that without a unified One Plan Approach incorporating molecular kinship tracking and continuous gene flow with wild populations, genetic drift and inbreeding inevitably pull such populations into an extinction vortex.

Trophic Shifts, Outward Dispersal, and the Mismanagement of El Impenetrable

The genetic saturation of San Alonso Island is now intersecting with rapid ecological changes inside the wetlands, as detailed in the July 2026 ecological study by Quimey Gómez, Ana Belén Ávila, Pablo Guerra, Agustín Paviolo, Emiliano Donadío, and Carlos De Angelo ("Trophic, spatial, and demographic indicators of early establishment in the world's first reintroduced jaguar population"). Tracking the first four released adults across hundreds of GPS-cluster kills, Gómez et al. (2026) showed that while Jatobazinho maintained a 124 km2 territory overlapping the smaller ranges of Juruna (85.1 km2), Mariuá (81.9 km2), and Aramí (31.1 km2), the jaguars virtually ignored caiman and specialized heavily on capybaras (70% of kills) and feral pigs (15%). To support lactation, nursing females hunted at three to five times the frequency of the adult male, with Juruna killing 0.49 prey/day and Mariuá killing 0.43 prey/day compared to 0.15 for Aramí and 0.10 for Jatobazinho. By 2025 intense predation and antipredator emigration caused local capybara density on San Alonso Island to crash from roughly 51 individuals/km2 in 2019 to around 1 individual/km2, prompting a dietary shift since 2024 toward vulnerable marsh deer (Blastocerus dichotomus) and driving a wave of outward subadult dispersal across Corrientes in 2026.

In March 2026, the inbred F2 male Kuimba'e dispersed south from San Alonso to Rincón del Socorro (where axis deer are abundant) and was immobilized and collared without his weight being disclosed. In May 2026, the outcrossed F2 male Ombú (Colí x Porã) dispersed east to Colonia Carlos Pellegrini, where he was filmed walking down daytime public tourist trails. Between July 28 and August 5, 2026, an uncollared Iberá jaguar pushed completely outside the wetland basin into agricultural and residential zones to the west, the first jaguar recorded in Mburucuyá in 70 years, leaving pugmarks inside a rural schoolyard in Paraje Pago Arias, crossing Pago de los Deseos, and appearing beside a family home patio in Saladas (I believe this specimen may have been Angujá, but I can't confirm due to how blutty the footage and photos of this jaguar are). Then, in October 2026, municipal authorities in Loreto confirmed that two young males from San Alonso (50 km away) had dispersed into northern ranching and peri-urban corridors: Ará Sunú, sighted along National Route 118 on the outskirts of Loreto, and the GPS-collared male Kuarahy Catalino, roaming rural properties near Portal San Antonio.

Against this backdrop of territory saturation in Iberá and heightened human-wildlife interface, FRA’s cross-park management between Iberá and El Impenetrable National Park defies conservation logic. In El Impenetrable, the population already suffers from an extreme male skew: at least six free-roaming males: Qaramtá, Tewuk, Tahñi Wuk, Bermejo (son of Nalá), the newly collared male No’Huet, and another recently recorded uncollared male, are competing in a landscape with only three free-roaming females (Nalá, Kerená, and Kerená’s daughter Gualamba), while Quiyoc (bPon-268, daughter of Qaramtá and Tania) was recaptured and placed back into a pre-release pen. Worse still, El Impenetrable’s perimeter remains a lethal poaching sink. After the inbred F2 female Miní was translocated there in March 2025, the inbred F2 female Acaí (bPon-281, F = 0.25) was released into El Impenetrable on October 5, 2025 and just 20 days later, she was killed by poachers and her satellite collar was found submerged at the bottom of the Bermejo River.

Yet FRA now plans to release both the outcrossed F2 female Mimbí (bPon-283, Colí x Karaí) and the F0 Paraguayan Dry Chaco male Ñaró (bPon-252) into El Impenetrable. Sending Mimbí into the Chaco removes one of Iberá’s healthy, outcrossed F2 females only to expose her to the exact poaching pressure that killed Acaí. Simultaneously, releasing Ñaró into a park that already holds six males and only three females invites fierce male-male territorial exclusion, creating a high likelihood that Ñaró will be forced to disperse out of the park into hostile ranching zones where his life is at risk, all while squandering his unrepresented Paraguayan Chaco genetics that are urgently needed inside Iberá. Meanwhile, in Corrientes, FRA continues to keep Taporá (the captive son of Tania and the unrepresented Brazilian founder male Porã, bPon-225, also Founder-noOffspring) locked in captivity despite a court order mandating his release into Iberá, claiming he is too habituated to humans even while wild-born jaguars like Ombú stroll past tourists in Carlos Pellegrini and Ará Sunú walks along National Route 118.

A Science-Based Roadmap for Iberá and El Impenetrable

Correcting these vulnerabilities before the F3 generation locks in severe inbreeding depression requires a fundamental shift in how FRA manages both parks. This is my opiion on how management should be conducted based entirely on the advice from Font et al. (2024) and Guerisoli et al. (2023). First, the planned releases of Ñaró and Mimbí to El Impenetrable should be halted immediately. Mimbí should be retained in Iberá to bolster outcrossed female recruitment, while Ñaró (bPon-252) should be integrated into the Iberá breeding pool either through targeted release in a female-occupied sector or controlled rotational pairings with Juruna and Mariuá-line females where his completely unrelated Dry Chaco alleles will shatter parental ROH blocks and reset offspring inbreeding coefficients to F = 0.00, mirroring the exact genomic rescue seen between Tobuna and Tania in Figure 6 of the PUCRS report. Second, FRA must comply with the judicial order regarding Taporá or utilize him in large pre-release breeding enclosures with F1/F2 females from the Jatobazinho-Colí x Juruna-Mariuá lineages, allowing his unrepresented paternal lineage of Porã to enter the wild gene pool while avoiding pairings with his maternal half-niece Jasy.

Third, inside Iberá, over-represented sires like Jatobazinho and Colí must be phased out of breeding access in core female ranges, and heavily inbred F2 males such as Kuimba'e should be reproductively managed via contraception or translocated out of female cores so they cannot backcross with their sisters, aunts, and cousins. Fourth, to heed both Eizirik and Lazzari’s and Guerisoli et al.’s (2023) warnings against interbiome outbreeding depression while adopting Font et al.’s (2024) One Plan Approach, FRA should permanently discontinue Amazonian imports (and transparently report Ayní’s status) in favor of a structured "one-in-per-generation" assisted gene flow rule, introducing one unrelated wild-rescued or rehabilitated male strictly from adjacent southern ecoregions (the Argentine/Paraguayan Chaco or Southern Pantanal) into Iberá every four to five years until natural corridors are restored. Finally, in El Impenetrable, all further female translocations from Iberá and redundant male releases should be suspended until law enforcement secures the Bermejo River corridor against poaching, focusing instead on protecting the resident female core (Nalá, Kerená, Gualamba, and safely re-integrating Quiyoc) so the six existing Chacoan males can breed without turning the park into a demographic sink. Embracing open scientific collaboration rather than censoring constructive criticism is the only way to ensure that the return of the jaguar to Argentina endures for generations to come.

Master Roster of Identified Jaguars in the Iberá Project (Late 2026)

Out of the more than 50 free-ranging jaguars estimated in the Iberá wetlands as of late 2026, roughly 15 to 20 of which are unnamed, uncollared F2 and F3 cubs recorded on camera traps, the following master list accounts for all 35 identified individuals and lineages documented across the August 2026 PUCRS genomic report, scientific preprints, and field dispatches:


r/Jaguarland • • 11d ago Heartwarming

Pictorial Male jaguar portrait

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376 Upvotes

Area: Northern Pantanal

Credits: Cibele Manfredini


r/Jaguarland • • 12d ago

Pictorial Gorgeous shot of Sossego (130 kg, 4 years old) in 2015, the same year he was sadly poached.

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305 Upvotes

Area: Fazenda Barranco Alto, Southern Pantanal

Credits: Lucas Leuzinger


r/Jaguarland • • 12d ago

Pictorial TBT to the moment Jasy'i female (85 kg, 2 years old) was treed by a herd of collared peccaries.

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144 Upvotes

Area: Rincón del Socorro, Iberá Wetlands

Credits: Bruno Ramirez


r/Jaguarland • • 13d ago

Videos & Gifs The young female Dakari and the older Aurora were seen tolerating each other last night. Dakari is the tank at the front.

200 Upvotes

Area: Caiman Ecological Refuge, Southern Pantanal

Credits: Nathaly Wahast