The chickadees are a group of North American birds in the family Paridae included in the genus Poecile.
A proposed bill in 2019 would have named the black-capped chickadee as the official species for Maine, but was unanimously voted down in committee.
One holarctic species is referred to by a different name in each part of its range: grey-headed chickadee in North America and Siberian tit in Eurasia.
Chickadees' preferred habitats include mixed deciduous or coniferous forests, parks, open woods, cottonwood groves, willow thickets, and disturbed areas.
Birds that live in harsher conditions, where their ability to remember the location of food is more important, have been found to have better memory abilities, a larger hippocampus, and more neurons than chickadees that live in milder climates where food sources are easier to find without relying on memory.