While there is no denying ‘survival of the fittest’ still reigns supreme in the animal kingdom, a new study shows being smartest – or at least smarter – is pretty important, too. Western University ...

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 are friendly and adorable birds. Check out super cute chickadee pictures captured by backyard birders across ...

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