In the early 20th century, ornithologist Robert Ridgway published a massive dictionary to categorize birds’ hues, from ...

(Credit Júlia D'Oliveira) A ‘one of a kind’ fossil discovery could transform our understanding of how the unique brains and intelligence of modern birds evolved, one of the most enduring mysteries of ...

Long before birds fluttered their wings and took their maiden flight, it was pterosaurs - the distant cousins of birds - that ...

"But evolution acts on all parts of the body ... the researchers used X-ray videos of a present-day bird—a helmeted guineafowl—to precisely measure the knee-joint poses of the bird.

Scientists identify mutation that could facilitate H5N1 "bird flu" virus infection and potential transmission in humans.