Red-bellied piranhas live in lakes and rivers in South America. They sometimes use their mighty mouths to gobble up other fish or animals such as shrimp, worms, and mollusks. They swim and hunt in ...

These seabirds are known for their wild look and sound—no wonder they're sometimes called the rock stars of the penguin world. Many penguins thrive in freezing conditions. They shrug off subzero winds ...

The Gila monster is one of only a few poisonous lizards in the world. The Gila (pronounced HEE-luh) is the largest lizard ...

You probably know sea stars as starfish, the name sea stars are commonly known by. But sea stars aren’t really fish. Sea ...

Known as “America’s wolf,” red wolves are the only species of wolf that lives in the United States—and nowhere else.

Snowy plovers are small shorebirds that dash in and out of waves at the beach. While it looks like they are playing, these ...

An adult African elephant's trunk is about seven feet (two meters) long! It's actually an elongated nose and upper lip. Like most noses, trunks are for smelling. When an elephant drinks, it sucks as ...

These horses are smaller than most domestic horse species and have stocky bodies, large heads, thick necks, upright manes, and a dark stripe down their backs. Their underbellies and muzzles have pale ...