More intelligent species of birds may spend longer in the nest and have more neurons in a specific area of the brain, research finds.

"We knew that hummingbirds were colorful, but we never imagined that they would rival all the rest of the birds combined," says ornithologist Richard Prum.

The first dinosaurs had metabolisms akin to today's birds. "Dinosaurs included remarkably swift and agile animals," says Derek Briggs.

Which animal was the mother of giant prehistoric eggs in Australia? A new study shows it could only be the "demon ducks of doom."

About 40 bird species have become infected in the current North American outbreak of avian flu, report researchers.

Brains and brawn has been behind crows' and ravens' ability to live in a variety of habitats all over the globe, researchers explain.

One of the fundamental questions in biology, and a centuries-old academic debate, is: How do new species form? Birds in New Guinea offer answers.

Birds with big brains may respond to climate change better than birds with smaller brains. But this doesn't mean "brainy birds are going to do just fine."

Threatened birds have disappeared from almost 70% of Australia—and 10 birds have become locally extinct from 99% of their historical habitat.

Bird flu has shown up again in the United States, but what exactly is it and should you worry? An expert explains what's important to know.