The black-capped chickadee (Poecile atricapillus) is a small, nonmigratory, North American songbird that lives in deciduous and mixed forests. It is a passerine bird in the tit family Paridae. It is the state bird of both Maine and Massachusetts in the United States, and the provincial bird of New Brunswick in Canada.
The curious, intelligent Carolina Chickadee looks very much like a Black-capped Chickadee, with a black cap, black bib, gray wings and back, and whitish underside. Carolina and Black-capped chickadees hybridize in the area where their ranges overlap, but the two species probably diverged more than 2.5 million years ago.
The tiny Mountain Chickadee is a busy presence overhead in the dry evergreen forests of the mountainous West. Often the nucleus in mixed flocks of small birds, Mountain Chickadees flit through high branches, hang upside down to pluck insects or seeds from cones, and give their scolding chick-a-dee call seemingly to anyone who will listen.