Birds are warm-blooded vertebrates (vertebrates have backbones) and are the only animals with feathers. Although all birds have wings, a few species can't fly.

50 Birds, 50 States Barry the bald eagle soars from coast to coast to meet state birds and learn about their homes. Each episode is an animated rap music video focusing on the big cities, history, …

Why is it a ‘dawn’ chorus? But why birds sing in the early morning is still “an open question,” says Mike Webster, an ornithologist at the Cornell Lab of Ornithology.

Atlantic puffins are birds that live at sea most of their lives. They fly through the air like most birds, but they also "fly" through the water, using their wings as paddles.

Looking across the assortment of birds featured here, you’ll notice that each species is vastly different from the others, either in color, shape, or feather arrangement.

The ostrich is the tallest and the heaviest of all birds. While the huge ostrich is a bird, it does not fly. Instead it runs. One stride can cover up to 16 feet (4.9 meters)—about the length of a mid-size family …

How do birds remain immune? Another enduring mystery is how the birds protect themselves from the deadly toxin they carry.

Explore a family tree with more than 350 species. Learn more about these long-lived, intelligent, colorful birds.

Using more than half a million records collected from five migration sites in the Northeast and Great Lakes regions, scientists have revealed that birds of different species form lasting ...

From the iconic emperor penguin to the Magellanic penguin, these striking photos capture the beauty of the aquatic birds.