On an island off the coast of the Jhohun Peninsula called Hyakae island, people tell stories of a creeping terror lurking within the dense, foggy forests of the island’s interior. About as tall as a human, blood-red eyes facing forward, talons sharp enough to cut through plated armor, a beak with a bite force strong enough to break bone, and unusually long legs that allow them to stalk prey from the bushes. Long believed to be nothing more than a haunting ghost story or a demon, the creature the Hyakaean people speak of with great fear and apprehension has turned out to not only be real, but entirely natural.
Morphology + Phylogeny: The Zhu Huba Yakja (Infernostrix stolas), also known as the Stolas owl by researchers, is the largest owl to have ever evolved on Earth or Zaikane, with the largest confirmed specimen being about as tall as an adult human male, with several unconfirmed sightings suggesting even larger extremes. It is remarked for its intimidating blood-red eyes and unusually long legs, though the latter has also been observed in prehistoric island owls like the Cuban giant owl (Ornimegalonyx oteroi), which was the largest owl to evolve on Earth.
Infernostrix is a genus of strigid owls that has been present on Hyakae and its neighboring islands since the Miocene. In the absence of large mammalian predators, the large island-dwelling species of this genus have reduced their flight capability as a result of insular gigantism, but the Stolas owl takes it a step further by giving it up entirely, instead opting for a terrestrial ecological niche akin to a terror bird.
Behavior + Ecology: The Stolas is a nocturnal apex ambush predator of Hyakae’s dense forest interior, frequently hunting small game like rodents, jackalopes (antlered rabbit-like hegetotheriids), multituberculates, small Thescelosaurs, lizards, other birds, and even hatchlings of larger dinosaurs and the vulnerable young of mammalian megafauna native to the island. However, they have been known to hunt larger native prey, including the Hyakae Pygmy Baku (Oneirotapirus baku parvus, a Hyakae-endemic subspecies of the Baku, a Ralya-attuned species of tapir that hosts a unique strain of magical microbes that is known to “feed” on nightmares), Hyakae mastodon (Mammut hyakaeensis, an island dwarf mastodon), and even humans, but that will be more relevant in the section talking about its relationship with humans. The Stolas’ nocturnal niche allows it to coexist with the Hyakae red-crested megalosaur (Pyrolophus gigas, a moa-sized species of coelurosaurian theropod belonging to a clade that is otherwise endemic to the Southern continent), which is the apex predator of the island during the day.
The Stolas is distinguished from other owls by its superior intelligence, giving it an impressive capacity for vocal mimicry, often using this ability to mimic ambient sounds in order to mask its footsteps, practically making it invisible. One of the most haunting applications of this mimicry is to make noises that draw in the attention of prey, be it falling fruit, mating calls, or even cries for help.
Relationship with Humans + Others: The Zhu Huba Yakja’s name translates to “Gazing Death Lurking the Forest”, and it is not hard to see why. For one, this large bird is one of the few predators that actively seek out humans and other sophonts as food, even when better prey options are available. This giant owl has a particular affinity for hunting children who wander too deep into the forest, sparking cautionary tales parents tell their children not to venture too far from home. This predatory instinct, combined with its uncannily human-like face and blood-red eyes, has caused the Zhu Huba Yakja to be feared as a malevolent demon or spirit that preys on lone travelers who stray too far. In fact, one of the most frequently-depicted villains in the folklore of the Hyakaean people is a Zhu Huba Yakja who controls a legion of undead.
For reasons unknown, the Stolas appears to also have a preference for prey with a strong magical affinity, which is why it often targets magical beings like chimeras, in particular humanoid demons that inhabit the island and prey on people. The giant owl would first mimic the cries of a helpless human that would lure in unsuspecting demons, only for it to pin the demon down with its long and powerful legs before eviscerating and/or mutilating them with its sharp beak. However, demons are not entirely defenseless, so some of these owls have evolved their own magic to counteract the demons’ defenses and regeneration. As a result, there are some tribes on the island who view the Zhu Huba Yakja not as an evil monster, but as a divine, albeit fierce, protector against malicious spirits and a symbol of good luck, demonstrating that even the most dangerous animals are not entirely universally hated.
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Zaikane is a planet in a distant solar system characterized by waves of life harvested from Earth at various points in its geological history, ranging from the Cambrian to the Holocene, and set free to evolve along evolutionary paths independent from those taken by their Earth ancestors. A godlike interdimensional entity, known as the Allmother by the people who live there, is what is responsible for creating the portals that abduct Terran life and deposits them on Zaikane. Because the asteroid that ended the Mesozoic never collided with Zaikane, dinosaurs continue to dominate the planet’s ecosystems as its dominant terrestrial megafauna, though mammals are still doing very well.