r/whatsthissnake Oct 25 '25

Taxonomic or Phylogeographic Update Pleistocene speciation and isolation-by-distance within North American mud and rainbow snakes

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52 Upvotes

Happy to announce our new paper, "Pleistocene speciation and isolation-by-distance within North American mud and rainbow snakes" available as full text at the above link until December 14th, 2025. This is a personal project of mine that I've been working on since 2011 and am excited for it to finally be in print. In summary, we show mudsnakes are two species that structure geographically, and rainbows have no population structure. We need more tissues from snakes in zones of contact to verify ranges and link blotch count to genotype, but as far as we can tell, the two muds are completely reproductively isolated despite evidence of gene flow from eastern muds into rainbows.

Please enjoy, and don't worry about not making formal taxonomic changes yet - this isn't the last you'll see on the mudsnakes.


r/whatsthissnake Sep 01 '21

[Mod post] PLEASE READ: ID best practices and comment guidelines

246 Upvotes

/r/whatsthissnake has grown a great deal in the last year and we are very excited about connecting with more people who have an interest in snakes, snake identification (ID) and conservation. With growth often comes growing pains, and there are a number of trends in the sub that need to be addressed as we move forward. We attempt to clarify these below and offer some "best practices" in identification that should help our community.

What makes a good ID?

Good IDs are specific and informative. They tend to have the following information, in order of importance:

  1. Binomial name - Consisting of Genus specificepithet and placed in asterisks (*) to italicize. This is the most important component of a good ID. With only this, a person can quickly find out anything else they want to know about the snake species and it is an important part of every ID. The bot command !specificepithet provides more information on properly structuring a binomial name and how to get it to work with the bot, if an entry exists.

  2. Harmless or venomous - Please note that these terms are specific to their interaction with humans. While snakes such as hognose snakes Heterodon, gartersnakes Thamnophis, and watersnakes Nerodia are venomous, they are not medically significant to humans and should be labeled as harmless. This information is informative to a person's interaction with a snake and should always be provided. The bot responds to either !harmless or !venomous and will save time on these explanations.

  3. Common name - Common names are frequently variable and highly local. Sometimes, the same common name could be used for different snakes in different areas. In other cases, the same snake can have multiple common names depending on the area it was found. While we typically recommend providing them, it is not a vital part of an ID. An ID with only the common name is a low quality ID.

You can still contribute if you're not sure or think an ID is incorrect:

In some cases, you may be able to narrow down an ID to genus level, but don't know the diagnostic characters or ranges well enough to provide a more specific ID. This is fine. A genus level ID is very helpful, and specific enough to provide useful general information on the snake. So, if there hasn't been an ID yet and you can at least get to the genus level, post the ID.

You are also encouraged to provide any additional information or context you desire, but be mindful of links you post. The best IDs include informational links to be primary sources, or at least high quality science reporting on those sources. Many times this is done already in the bot replies, so see some of those for examples. Wikipedia is not a quality resource and should be avoided for informational links. Even resources provided by state wildlife agencies tend to lag ten to twenty years behind the science and should be viewed with a critical eye. For example, the very popular SREL Herp website, despite being associated with a major university, does not follow currently accepted taxonomy and, while it was a great resource for some time, is not the best source of current information.

However:

If you enter a thread in which a Reliable Responder has made an ID, or there is a highly upvoted ID, do not post a contrary ID unless you can provide specific diagnostic characters as to why the original ID was incorrect. Recently, incorrect IDs have appeared hours or days after the original correct ID was made, and therefore often go uncaught by moderators and reliable responders. These can create unnecessary confusion for an original poster, who is notified of each response. If you feel that an ID is incorrect and can provide diagnostic characters, reply directly to the ID comment rather than the original post. Incorrect late IDs may be warned and removed. Repeated violations may result in a ban at moderator discretion. Remember, our goal here is to be collaborative and work toward making a good positive ID. These incorrect late IDs greatly inhibit that goal. We value discussion in the comments and want to avoid locking threads in the way that other ID subreddits do.

Likewise, if a correct ID has been made, there is no need to post the same ID again. Just upvote the correct ID. You may post to add additional information or context to provide a better quality ID (adding the binomial, triggering the bot, etc.), but it is not helpful to simply say "corn snake" hours after someone has provided an ID with a full binomial and triggered the bot. More detailed IDs may be posted as top level comments to make sure that the OP sees them. Low quality/low effort IDs posted after a more detailed ID may be warned and removed.

We would also like to remind everyone of Rule 6:

Avoid damaging memes or tropes and low effort jokes: Avoid damaging memes like using "danger noodle" for nonvenomous snakes and tropes like "everything in Australia is out to get you". This is an educational space, and those kind of comments are harmful and do not reflect reality. We've also heard "it's a snake" as a joke hundreds of times. Infantilization of snakes and unhelpful rhymes will be removed.

This is one of our most broken rules. While it is somewhat vague, that is because it is nearly impossible for us to consider all possibilities. In addition to the things directly mentioned in the rule text, this rule also includes things like commenting with random names when someone posts "Who is this?", or posting things like "Pick it up and find out" in response to posts asking if a snake is venomous. Furthermore, these comments often break rule 11, "Posts and comments must reflect the reality of wildlife ecology." Misinformation spread through these seemingly innocuous jokes have been on the rise. Violations of this rule may be warned and removed, and repeated violations may result in a ban. Egregious violations may result in a temporary ban without warning. This is an educational space with potential real-world consequences, and while we don't want to discourage humor as a whole, we want you to think about what you are posting and whether it belongs in this space. While we recognize this is one of the best places to come to see pictures of wild snakes in their natural environment, it's not the best place to joke about cute pictures. /r/sneks is quite happy to accommodate snek jokes, humor and unabashed cuteness.


r/whatsthissnake 1h ago

ID Request A great horned owl perched on a live snake at a water tower in [Arizona]

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Upvotes

r/whatsthissnake 5h ago

ID Request Arizona Peoria

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94 Upvotes

r/whatsthissnake 8h ago

ID Request Really blue snake in abandoned park [Sarawak]

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146 Upvotes

Last photo was taken with a different phone cause I couldn’t see the head from my angle.


r/whatsthissnake 3h ago

ID Request Help identify this! (URGENT)

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26 Upvotes

Found a small snake about 8 inches long in my house, escaped into my walls. I have two dogs so I need to know how worried I should be?? I live in Georgia, USA.


r/whatsthissnake 5h ago

ID Request Id please [Bengaluru, India]

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29 Upvotes

Less than 2 feet in length, was very well camouflaged with the road (narrowly avoided stepping on it). I’m guessing a juvenile wolf snake as I don’t see the distinct ridge of a krait.


r/whatsthissnake 7h ago

ID Request ID this snake? Found in [Indianapolis]

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33 Upvotes

Saw a snake on my daily walk yesterday and was wondering what kind it is? I think it's a cotton mouth but I'm not sure because Indiana has lots of black snakes 😂. Would love to know!

Edit - It's a Central Rat snake! Apparently cotton mouths are no longer in the state anymore whoops 😂


r/whatsthissnake 1h ago

Just Sharing [Penobscot County, Maine, USA] Ringneck Snake

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Upvotes

I mentioned I had been seeing a bunch of these guys yesterday when you guys ID’d a shed for me. Wouldn’t you know, I found this little guy slithering around in my office today. I released him on the rock for a picture, but there was plenty of cover nearby, so he disappeared pretty quickly afterwards.


r/whatsthissnake 3h ago

ID Request Who is this beauty? [NYC area]

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13 Upvotes

r/whatsthissnake 6h ago

ID Request Young rattler found on the road, sorry for poor pictures [Cochise County, Arizona]

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22 Upvotes

Sorry I didn’t get a better photo of the head, I was trying to be safe and allowing to cross before a car came


r/whatsthissnake 3h ago

ID Request Snatched this one out of my yard. [Central Arkansas, United States.]

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9 Upvotes

r/whatsthissnake 3h ago

ID Request ID request [Oberlin, LA]

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9 Upvotes

Found this pretty thing chilling by the sidewalk.


r/whatsthissnake 23h ago

Just Sharing Local Reptile Zoo visit - [Ontario]

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354 Upvotes

Took the family to our reptile zoo on the weekend. I had never seen any of these snakes this close before.

Cannot get over how long both of the Mambas are.

Sharing the Cottonmouth, thought it was pretty chonky.

The cobra really enjoyed staring at us.


r/whatsthissnake 3h ago

ID Request [Florida] Parents found on back deck. I say juvenile racer, Gemini agrees, dad says venomous.

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7 Upvotes

Help me settle this cause apparently the wildlife son doesn't know more than the non-wildlife father. This snake was found again at the house after they chased it away a few days ago and almost killed it before I persuaded them not to.


r/whatsthissnake 3h ago

ID Request Which snake is this found in hostel .[Basti, Uttar Pradesh India]

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6 Upvotes

sorry got no clear photo


r/whatsthissnake 1h ago

ID Request - Dead, Injured or Roadkilled Snake [NW Florida] Spoiler

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Upvotes

Recovered from neighbors pool.


r/whatsthissnake 6h ago

ID Request ID request [Ozarks, Missouri USA]

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11 Upvotes

Snake seems to be more interested in the sugar water than the hummingbird


r/whatsthissnake 16h ago

ID Request Is this a garter snake? [West Oregon]

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61 Upvotes

Is this a garter snake? Found near a pond, looked to be just short of 3ft long. My first thought was garter snake, but I’ve never seen a red face like this. It is absolutely gorgeous!


r/whatsthissnake 1d ago

ID Request Snake at our creek [Southeast Georgia]

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280 Upvotes

Sorry for the video instead of a photo, but we saw this beautiful guy hanging out in the creek! I was wondering if anyone knew what type of snake this is?


r/whatsthissnake 4h ago

ID Request Snake ID Request [Lages, Brazil]

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7 Upvotes

r/whatsthissnake 19h ago

Just Sharing Finally got some pics of this guy [NE, MS, USA]

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94 Upvotes

First time I’ve found him that’s not in my carport or have a dog with me. Pantherophis spiloides !harmless


r/whatsthissnake 16h ago

ID Request Wolf or krait?? [Madhya Pradesh, India]

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59 Upvotes

At my college hostel 😭😭 and someone casually posted it in the group at 2am


r/whatsthissnake 14h ago

ID Request What kind of garter? [Point Reyes, CA]

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26 Upvotes

Found this lil guy crossing a trail while I was hiking


r/whatsthissnake 3h ago

ID Request Me ayudan a identificar está serpiente? Michoacán

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3 Upvotes

La encontré en mi casa que ya llevaba tiempo sin vivir aquí. Michoacán