Dinosaurs of all shapes and sizes sported feathers.

Dinosaurs Evolved Feathers for Far More Than Flight

Fluff and fuzz helped the creatures keep warm, blend in and communicate

One eagle fights another for a midshipman fish in a behavior called kleptoparasitism.

'Pirate Seabirds' Could Become a Pathway for Deadly Avian Flu to Spread to Australia, Study Finds

Kleptoparasitism, in which a bird harasses another to steal its food, might introduce avian flu to the continent, currently the only one without the severe H5N1 strain

A view from the webcast of the 34th First Annual Ig Nobel Ceremony.

Anus-Breathing Animals and Pigeon-Guided Missiles: Ig Nobel Prizes Reward Unusual but Valuable Science

The annual award ceremony featured costumes, songs and paper airplanes as scientists recognized comedic research across ten disciplines

The hoiho, or yellow-eyed penguin, is thought to be one of the world's rarest penguin species.

Rare Yellow-Eyed Penguin Wins New Zealand's Bird of the Year Contest

The noisy-but-shy bird, known as the hoiho, has earned the most votes for a second time amid threats to its survival

Bokmakierie's nest and eggs from the collection of the Natural History Museum at Tring

See the Wonders of Bird Engineering in These Photos of Intricate Nests

In a new book, a curator at England's Natural History Museum describes rare and interesting nests and eggs—from the house sparrow to the village weaver—and the lessons they hold for avian conservation

American redstarts and magnolia warblers were thought to fly together merely by coincidence, but new research suggests they might be forming a social relationship.

Birds Form Surprising Relationships With Other Avian Species During Migration, Study Suggests

New research indicates that birds are not alone while migrating—and sharing space with other species may even help them on the journey

With a white frame around its eye and green feathers, this Swinhoe’s white-eye is easily camouflaged when flying from flower to flower.

See 15 Amazing Photos of Beautiful Birds

These Smithsonian Magazine Photo Contest images celebrate our feathered friends

A young blackpoll warbler with a NanoTag on Borgles Island, Nova Scotia

Tiny Trackers Are Revealing the Secret Lives of Tens of Thousands of Birds

The Motus Wildlife Tracking System has put nearly 50,000 incredibly lightweight radio transmitters on birds, bats and insects. We caught up with an ornithologist to learn more about where these creatures are flying

A mother manatee and her calf in Florida's Crystal River amid eelgrass, which is crucial for supporting the large mammals.

See 13 Captivating Images From the Wildlife Photographer of the Year Contest

The highly commended shots provide a preview of the 60th annual competition, which spotlights astounding animal behaviors and the conservation issues they face

Did Hawaiian dancers traditionally wear grass skirts? 

What's the History of Hawaiian Grass Skirts? And More Questions From Our Readers

You’ve got questions. We’ve got experts