Pigeon
A bird of the family Columbidae; the feral pigeons common in cities descend from domesticated rock doves that returned to the wild. Their strong homing instinct led to their long use as message carriers.
Through selective breeding, humans created roller pigeons that do somersaults mid-flight. The 'Parlor Roller' can't fly at all — it just rolls backward on the ground. Fans see it as fun, but scientists call it a nervous system disorder.
0