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, those adorable bandit-masked visitors to bird feeders, are among the most familiar and beloved backyard birds in North America. They’re so good at spotting and scolding predators that ...

In the hybrid zone that encompasses the Lehigh Valley in Pennsylvania, the habitats of the Carolina Chickadee and the Black-capped Chickadee converge, creating an opportunity for the different species ...

Mountain chickadees in Boulder have evolved a different tune to avoid getting mixed up with their cousins, according to a new study led by the University of Colorado Boulder published Oct. 9 in the ...