A member of the super-hero team the Avengers published by Marvel Comics.

Bonita Juarez is the real name of Firebird. Juarez was walking in the desert when as huge fireball fell from the sky, exposing her to its radiation. Juarez discovered that she had ability to control a fiery energy and the ability to fly. Thinking that her exposure was a manifestation of the legendary firebird of the American southwest, Juarez adopted that as her codename: Firebird.

Firebird was initially associated with the loose confederation of heroes known as the Rangers. These five heroes of the American southwest (Firebird, Red Wolf, Shooting Star, Texas Twister, and Night Rider) did not serve as a team for very long, due to the constraints of the wide area in which they operated.

Eventually, Firebird became associated with the Avengers west coast branch. During that time, Firebird's faith in God caused her to change her name to Espirita. Also during this time, Firebird discovered that her powers were the result of a extraterrestrial experiment gone awry.