Four of North America’s seven chickadee species live here in Washington state, according to the Washington State Department of Fish and Wildlife, and the black-capped variety is the most common.

These active backyard birds are more than just cute—they’re hardy survivors that have conquered the continent and are teaching scientists new things about avian evolution.

Peak bird migration is about to start in Colorado and around the country. Here are tools for tracking and identifying the millions of migrants.

The chestnut-backed chickadee is curious about humans, and spends the postbreeding and winter seasons foraging noisily in mixed-species flocks. Unlike other parids (except for the mountain ...

Other birds, of course, are singing in March, for example, the American robin, but it seems they are more often vocal at dawn ...

Black-capped and mountain chickadees are closely-related species that co-occur in Boulder County but occupy different habitats based on elevation. The Boulder Chickadee Study leverages an extensive ...

the Carolina chickadee likely will cause the most trouble, especially in late spring and summer when the black-capped’s white wing edgings are worn. Where their ranges overlap, the 2 species ...

Since 1999, the standard Maine license plate has featured a chickadee — the artwork by Mark McCollough, an endangered species ...

Human-modified environments, such as cities, are altering species interactions and increasingly leading ... I investigate how disturbance modifies interactions between chickadees to promote ...