Zorvala

The Zorvala is a flightless Bird Wyvern that has traded its flight for extreme speed during its evolution. It resembles a Gypceros, but is covered in scarlet feathers, with cyan quills on its head, back, and tail. These quills can cause their targets to fall into a hypnotic slumber.

Zorvalas were formally believed to be a crossbreed of a Gypceros and a Hypnocatrice, but its arm-like wings and unique quills suggest other origins.

Ecology
Zorvalas are mostly carnivorous; their sleep-inducing quills are due to a secondary diet of Sleep Herbs. Similar to how flamingos are pink from shrimp, their quills are cyan in pigment because of the herbs.

Despite lacking functional wings, Zorvalas nest in the trees. They are excellent climbers, using their wing claws and cleat-like talons to carry their light weight into the canopy. However, not much more information is known about the Zorvala's behavior.

Trivia

 * Zorvala is based on terror birds, the hoatzin, and chickens.
 * They are about the size of a Yian Kut-Ku.
 * Zorvala is one of the few (if not the only) flightless non-therapod Bird Wyverns.