Goldfish can recognize their owners and have been trained to perform tricks like swimming through hoops.

Some birds can see ultraviolet light.

Fact #120 · Animals

A sloth can take up to a month to digest a single meal.

Fact #441 · Animals

A giraffe's heart can weigh over 20 pounds.

Fact #447 · Animals

Certain reptiles regulate body temperature through basking.

Fact #527 · Animals

Some reptiles can live for over a century.

Fact #319 · Animals

A porcupine raises quills as a defense mechanism.

Fact #524 · Animals

A sea otter uses its chest as a surface for cracking shells.

Fact #530 · Animals

Some species of penguins can swim at speeds of up to 15 miles per hour.

Fact #251 · Animals