Some species of jellyfish are cannibalistic — consuming other jellyfish species.

Emperor penguins can dive deeper than 1,500 feet.

Fact #344 · Animals

Some species of jellyfish can shrink and regrow their bodies.

Fact #428 · Animals

Some species of birds form lifelong pair bonds.

Fact #537 · Animals

Many birds use Earth's magnetic field for navigation.

Fact #388 · Animals

Certain birds of prey have exceptionally sharp vision.

Fact #434 · Animals

Some sharks can reproduce without a mate in rare cases.

Fact #544 · Animals

Octopuses have three hearts and blue blood.

Fact #1 · Animals

Some birds can imitate sounds from their environment.

Fact #489 · Animals