Bird
A bird was a type of animal found on Earth and many other planets.
Birdie was named after his fondness for birds. (TV: Mutant Copper)
Uses
As laboratory mammal
Birds were used by humans to study the effect of certain chemicals, as in the case of their use to test a new chemical weapon in 1943. (TV: The Curse of Fenric)
Elsewhere in the Universe
The First Doctor, John and Gillian visited an Earth-like planet inhabited by giant birds which briefly captured them, but they escaped with the aid of an ugly animal. (COMIC: Kingdom of the Animals)
The Galyari revered birds. The Sixth Doctor used their birds to defeat Voshkar. (AUDIO: The Sandman)
The planet Pheros was inhabited by intelligent metal birds. (TV: The Infinite Quest) The devil-birds of Corbo were robots designed to resemble birds. (PROSE: The Devil-Birds of Corbo)