As more and more "historical" checklists are added to the platform, birds we've lost now mingle with those still hanging on.

Q: The amount of effort that goes into a Christmas Bird Count varies quite a bit across years and count circles. How do you deal with this issue when you calculate abundance trends? How do you know ...

This bird is noteworthy on several counts. It lives nowhere in the world except Florida, it has a complicated social system, it has been the subject of very detailed field studies, and it is ...

Our collection of birding essentials makes it possible to watch your favorite species, right from the comfort of your own home. Audubon's collection of bird feeders, houses, bird baths, and ...