A puffin uses its colorful beak to attract mates.

Some birds cache food for later consumption.

Fact #461 · Animals

A dolphin’s brain is relatively large compared to its body size.

Fact #456 · Animals

Some mammals hibernate during winter.

Fact #303 · Animals

Some lizards can detach their tails to escape predators.

Fact #509 · Animals

Some birds sing complex songs to mark territory.

Fact #517 · Animals

Some birds use tools to extract insects from wood.

Fact #416 · Animals

Some marine mammals communicate through clicks and whistles.

Fact #525 · Animals

A sea sponge is an animal, not a plant.

Fact #541 · Animals