Both beak shape and body mass are also important. In general, smaller birds generate higher frequency sounds, with larger ...

They constantly whistle a chirpy "bee-bee-bee-bee" song to attract mates or defend their territories. Black-capped chickadees ...

Although the mountain chickadee is the black-capped’s closest relative, the Carolina chickadee likely will cause the most trouble, especially in late spring and summer when the black-capped’s ...

Black-capped chickadees are found at feeders throughout ... chickadee’s surprisingly long life span—about 10 years! Bird songs provided by the Cornell Lab of Ornithology.