From 9-foot tall ostriches to albatrosses with gargantuan wingspans, here are some of the biggest birds in the world.

It's a "significant insight into the distribution and ecology," researchers wrote in a study published in the Australian ...

The increasingly popular gadgets, which take photos of avian visitors, are turning at-home birding into a shared experience.

Cowbird mothers abandon their eggs in the nests of other bird species, but the chicks somehow manage to find their flock and ...

Our groundbreaking science leads us to work across the hemisphere. In 1945, Audubon sounded the first alarm about the hazards of DDT, documenting the decline of bird species, including Bald Eagles and ...