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.

Owls, ospreys, and more!Sea eagles have a pretty amazing way of fighting off intruders! Watch them whirl in this video.

The team expects to find more birds of paradise species in New Guinea's biodiverse forests, which are so isolated and remote that human development has not encroached greatly on the …

How many birds are there in the world? New research estimates there are between 50 billion and 430 billion birds on Earth. A rooftop flock of pigeons flying over Bushwick, Brooklyn.

Courtship for these monogamous birds also takes place in flight. Their mating ritual begins with a “fish flight,” which is when a male Arctic tern swoops over a migratory camp carrying a fish ...

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 …

For centuries, researchers have pondered how starlings travel in those gorgeous shape-shifting clouds. The answers continue to surprise them.

A common bird of prey (a group of hunting birds that includes such birds as hawks and eagles), the peregrine is an adaptable falcon that can be found in almost any habitat. Peregrines live …

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.

Emperor penguins spend their entire lives on Antarctic ice and in its waters. They survive—breeding, raising young, and eating—by relying on a number of clever adaptations. …