Hybrids of two common North American songbirds, the black-capped and mountain chickadee, are more likely to be found in places where humans have altered the landscape in some way, finds new CU Boulder ...

Chickadees, nuthatches and warblers foraging their way through forests have been shown to spur the growth of pine trees in the West by as much as one-third, according to a new study. Chickadees, ...

The birds in Beverly Merritt's yard are confused. For over 50 years, the local gathering of chickadees, jays and finches would pick up seeds from a birdfeeder and rest in the Merritt's tall spruce ...