The Orion wing-slug was a type of animal lifeform native to the Rigel star system. Though known as one of the most unpleasant and less appealing creatures in the galaxy, they were however considered a delicacy by the Orions (presumably when properly prepared and cooked). When Gary Mitchell heard that James T. Kirk was being reassigned to the USS Constitution to serve alongside him, Mitchell considered himself to be as happy as "a sloppy, fat Orion with a belly full of warm, juicy wing-slugs". (TOS - My Brother's Keeper novel: Constitution) The wing-slug might also hail from the planet Orion.