Chickadees are very acrobatic as they glean insects and insect eggs and larvae from leaves, twigs, branches and bark. Most of their diet is caterpillars and eggs of moths, aphids, scale insects, beetles and other insects and spiders. They may pull the wings off moths and discard them before eating the insect. Seeds and berries are also eaten and fat may be scavenged from animal carcasses. Like most chickadees, the black-capped chickadees store food regularly, a habit that is probably critical for winter survival.
Chickadees generally stick to their breeding range year
round but periodic irruptions occur outside their range,
usually during fall, winter and spring. Irruptions
southward are probably related to food shortages.