Elephants mourn their dead and have been observed holding vigils over fallen members of their herd.

Certain fish live in symbiotic relationships with other species.

Fact #535 · Animals

Some insects glow through bioluminescence.

Fact #529 · Animals

A mantis shrimp can strike with the speed of a bullet.

Fact #342 · Animals

Some birds can use tools to access hidden food.

Fact #576 · Animals

A leopard can carry prey heavier than itself up a tree.

Fact #452 · Animals

Some species of jellyfish glow in the dark.

Fact #357 · Animals

Some birds use tools to extract insects from wood.

Fact #416 · Animals

A crocodile can replace its teeth multiple times in its life.

Fact #406 · Animals