The immortal jellyfish is the only known animal capable of reverting to its juvenile form repeatedly.

Some species of ants wage organized territorial battles.

Fact #401 · Animals

Some fish use tools to crack open shellfish.

Fact #405 · Animals

Some species of ants can form bridges using their bodies.

Fact #420 · Animals

Some marine mammals communicate through clicks and whistles.

Fact #525 · Animals

Certain species of octopus are known to use coconut shells as shelter.

Fact #410 · Animals

Some birds cache food for later consumption.

Fact #461 · Animals

Certain frogs use bright colors to warn predators.

Fact #438 · Animals

Many birds use Earth's magnetic field for navigation.

Fact #388 · Animals