Dogs wag their tails for various emotional reasons.

The platypus is one of the few mammals that lay eggs.

Fact #382 · Animals

Some amphibians can absorb oxygen through their skin.

Fact #328 · Animals

Certain fish change sex during their lifetime.

Fact #503 · Animals

Certain frogs can glide from tree to tree.

Fact #394 · Animals

Some species of ants can form bridges using their bodies.

Fact #420 · Animals

Certain insects can enter a dormant state called diapause.

Fact #399 · Animals

Some reptiles can survive long periods without food.

Fact #501 · Animals

A group of porcupines is called a prickle.

Fact #358 · Animals