Parus atricapillus
black-capped chickadee

The Black-capped Chickadee is confined to North America, ranging through most of Canada and the upper two-thirds of the United States.

Black-capped chickadees prefer deciduous woodlands, open woods and parks, cottonwood groves, and willow thickets. They are most commonly seen near edges of wooded areas.

The Black-capped Chickadee is easily recognized by its short plump body, solid black cap and bib, and white cheeks. Its back and wings are dark greenish-gray, with some streaks of white and black.

Black-capped Chickadees hop on trees ( occasionally on the ground), rather than "walking." Pairs have set territories, ranging from 1.5 to 5.3 ha. Most pairs persist together for several years. The black-capped chickadee social system has two extremes, one shown by territorial pairs during the bredding season, and the other consisting of nonbreeding flocks. These flocks are often mixed species flocks, including in them nuthatches, woodpeckers, kinglets, creepers, warblers, and vireos.

Black-capped chickadees feed on both animals and plants (the overall consumption has been measured to be about 70% animal and 30% plant). Animal foods consist mainly of insects and spiders. Caterpillars are preferred in the breeding season. Chickadees have been observed eating deer or skunk fat and fish. Plant materials eaten by the chickadee include honeysuckle and blackberries, seeds from hemlocks, and wax-covered berries such as those of poison ivy and bayberry.

Black-capped chickadees give sharp "zeet" alarm calls when they see a predator. Predators are often mobbed by groups of chickadees in order to scare it away. Predators near nests often evoke a distraction display, where the chickadee lands near the predator, leans towards it with the tail feathers fully spread, and raises and lowers its wings. (Smith, 1993)

Adult black-capped chickadees are preyed on primarily by small hawks, owls, and shrikes, including sharp-shinned hawks (Accipiter striatus), northern shrikes (Lanius excubitor), eastern screech owls (Otus asio), and saw whet owls (Aegolius acadicus). Eggs and nestlings are preyed on by mammalian nest predators such as raccoons (Procyon lotor), squirrels (Sciurus and Tamiasciurus), opossums (Didelphis virginianus), and weasels (Mustela). House wrens (Troglodytes aedon) sometimes destroy eggs in order to take over the nesting cavity. (Smith, 1993)

Black-capped chickadees help control populations of insect species that may be harmful to agriculture and silviculture.

While the clearing of forests for agriculture has led to more forest edge, which is favorable to black-capped chickadees, too much cutting can cause lack of natural nest sites. Due to feeders and nestboxes, however, the black-capped chickadee has little current threat to its population. (Smith, 1993)