passenger pigeons
From Trekipedia
The passenger pigeon was a species of bird that once existed on Earth, and was driven to extinction by Humans, as noted by Dr. Robert Crater.[1]
Notes and References
- ↑ Roddenberry, Gene (Executive Producer). "The Enemy Within". Star Trek, season 1, episode 5 (Production number 05). Directed by Leo Penn. Written by Richard Matheson. Desilu Productions. 6 October 1966.
