All birders, backyard feeders and most other people know chickadees. These small, noisy, gregarious black and gray fluff balls are found in nearly any habitat, from the deepest wilderness area to urban parks and streets. There are seven North American species of chickadees, Carolina chickadee, Poecile carolinensis, black-capped chickadee, P. atricapillus, boreal chickadee, P. hudsonicus, chestnut-backed chickadee, P. rufescens, grey-headed chickadee, P. cinctus, mountain chickadee, P. gambeli and Mexican chickadee, P. sclateri.