The largest animal ever known to exist is the blue whale.

Some birds cache food for later consumption.

Fact #461 · Animals

Some birds use tools to obtain food.

Fact #294 · Animals

Some species of birds form lifelong pair bonds.

Fact #537 · Animals

Some birds can navigate using the position of the stars.

Fact #235 · Animals

A koala sleeps for many hours each day.

Fact #490 · Animals

A honeybee colony functions as a highly coordinated unit.

Fact #409 · Animals

A crocodile’s teeth are replaced throughout its lifetime.

Fact #532 · Animals

Crows can recognize individual human faces.

Fact #15 · Animals