Duck-billed platypuses are small, shy animals. They have a flattened head and body to help them glide through the water.

A luna moth perches on a leaf, its bright green wings folded over its body. Suddenly the insect spreads its wings to reveal their great size. This moth's wingspan can stretch four and a half ...

A bald eagle's white head may make it look bald. But actually the name comes from an old English word, "balde," meaning white. These graceful birds have been the national symbol of the United States ...

Komodo dragons are the biggest and heaviest lizards on Earth. Full-grown adults can reach 10 feet (3 meters) long and weigh more than 300 pounds (140 kilograms)! Most weigh about 150 pounds (70 ...

Polar bears live along shores and on sea ice in the icy cold Arctic. When sea ice forms over the ocean in cold weather, many ...

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

Thought to be some of the smartest animals on Earth, bottlenose dolphins send messages to one another in many different ways. They squeak, squawk and use body language—leaping as high as 20 feet in ...

As winter approaches, brown bears prepare for a long winter sleep. During the fall, a brown bear eats practically around the ...

Black rhinoceroses have a sort of attack-first-and-ask-questions-later attitude. When a rhino catches the scent of a human or anything else unfamiliar, it is likely to charge. Rhinos can't see well, ...

American alligators once faced extinction. The United States Fish and Wildlife Service placed them on the endangered species ...

When you see a snowy owl, it's clear how the bird probably got its name: they're snow-white. Males are generally whiter than females. As males grow older, they get whiter. The females never become ...

The giant squid is massive and when full grown can be at least 33 feet (10 meters) long. These mysterious eight-armed ...