Dogs wag their tails for various emotional reasons.

Dragonflies can fly in all directions, including backward.

Fact #352 · Animals

Male seahorses carry and give birth to their young.

Fact #359 · Animals

Some birds migrate thousands of miles each year.

Fact #77 · Animals

A squid can propel itself rapidly by jetting water.

Fact #417 · Animals

A crocodile’s teeth are replaced throughout its lifetime.

Fact #532 · Animals

Some birds can imitate sounds from their environment.

Fact #489 · Animals

Some mammals, like bats, use echolocation.

Fact #465 · Animals

Some sharks detect electrical signals from other animals.

Fact #128 · Animals