The platypus is one of five mammal species that lay eggs (monotremes) — the others are four echidna species.

A giraffe's heart can weigh over 20 pounds.

Fact #447 · Animals

Many birds use Earth's magnetic field for navigation.

Fact #388 · Animals

A group of porcupines is called a prickle.

Fact #358 · Animals

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

Fact #456 · Animals

Some insects have lifespans of only a few hours as adults.

Fact #411 · Animals

Some beetles produce defensive chemicals to deter predators.

Fact #481 · Animals

A tiger’s stripes are unique like human fingerprints.

Fact #468 · Animals

A group of flamingos is called a flamboyance.

Fact #10 · Animals