Sometimes, female lions can develop manes. Such masculine females  likely occur when the embryo is disrupted either at conception or while in the womb.

Anything that a duckling meets within the first ten minutes after birth, will consider its parent forever.

Blue jays and cardinals go bald in the late summer and fall. Usually, they lose all their feathers and replace them gradually. But, sometimes they lose them all at once, creating a bald head. They’re only bald for about a week though, and their feathers grow back.

The female loggerhead turtle will sometimes travel thousands of kilometers to return to the beach where they hatched their eggs.

Killer whales that live in captivity with dolphins can learn the dolphins’ complicated language and they eventually begin to use it themselves.