Grefna

Grefnas were avian beasts native to the planet Onderon. Their prominent cranial spine nerves allows flock members to visually track others through the undergrowth due to ultraviolet striations on the planet's surface, and serves to fend off predators.

Behind the scenes
Grefnas appear in the 2019's sixth expansion to the videogame Star Wars: The Old Republic, called Star Wars: The Old Republic: Onslaught. Grefnas can be bought as player mounts.