A small (4 ½ inches) songbird, the Carolina Chickadee is most easily identified by its gray back and tail, pale breast, black chin, and black cap. However, positive identification of this species is complicated where its range overlaps with that of the closely related Black-capped Chickadee (Poecile atricapillus). Carolina Chickadees are generally smaller and darker-winged than their northern relatives, but it is often impossible to separate the two species in the field by physical appearance alone. Hybrids with mixed physical and vocal characteristics do occur, further complicating identification. Male and female Carolina Chickadees are similar to one another in all seasons. The Carolina Chickadee breeds across much of the southeastern United States from the Mid-Atlantic south to central Florida and west to Texas. This species’ range overlaps with that of the Black-capped Chickadee in a narrow band stretching from the Mid-Atlantic region west to Kansas, particularly where that species’ range dips southward at higher elevations in the lower Appalachian Mountains. Carolina Chickadees are generally non-migratory. Carolina Chickadees inhabit a number of forest types, including deciduous and mixed deciduous-evergreen woodland habitats. This species also utilizes human-altered habitats, and may be found in urban and suburban areas where food and sufficient tree cover are available. Carolina Chickadees eat a variety of plant and animal foods, with insects predominating in summer and seeds becoming more important in winter. In appropriate habitat, Carolina Chickadees may be observed foraging for food in the tree canopy, often hanging from the ends of branches while eating seeds or picking insects off of leaves and bark. This species is also a common backyard feeder bird, visiting feeding trays as part of mixed flocks of small songbirds. This species’ song, a whistled “fee-bee, fee-bay” and its call, a clear “chick-a-dee-dee-dee,” are both higher-pitched than those of the Black-capped Chickadee. Carolina Chickadees are primarily active during the day.
A small (4 ½ inches) songbird, the Carolina Chickadee is most easily identified by its gray back and tail, pale breast, black chin, and black cap. However, positive identification of this species is complicated where its range overlaps with that of the closely related Black-capped Chickadee (Poecile atricapillus). Carolina Chickadees are generally smaller and darker-winged than their northern relatives, but it is often impossible to separate the two species in the field by physical appearance alone. Hybrids with mixed physical and vocal characteristics do occur, further complicating identification. Male and female Carolina Chickadees are similar to one another in all seasons. The Carolina Chickadee breeds across much of the southeastern United States from the Mid-Atlantic south to central Florida and west to Texas. This species’ range overlaps with that of the Black-capped Chickadee in a narrow band stretching from the Mid-Atlantic region west to Kansas, particularly where that species’ range dips southward at higher elevations in the lower Appalachian Mountains. Carolina Chickadees are generally non-migratory. Carolina Chickadees inhabit a number of forest types, including deciduous and mixed deciduous-evergreen woodland habitats. This species also utilizes human-altered habitats, and may be found in urban and suburban areas where food and sufficient tree cover are available. Carolina Chickadees eat a variety of plant and animal foods, with insects predominating in summer and seeds becoming more important in winter. In appropriate habitat, Carolina Chickadees may be observed foraging for food in the tree canopy, often hanging from the ends of branches while eating seeds or picking insects off of leaves and bark. This species is also a common backyard feeder bird, visiting feeding trays as part of mixed flocks of small songbirds. This species’ song, a whistled “fee-bee, fee-bay” and its call, a clear “chick-a-dee-dee-dee,” are both higher-pitched than those of the Black-capped Chickadee. Carolina Chickadees are primarily active during the day.
The Carolina chickadee (Poecile carolinensis) is a small passerine bird in the tit family Paridae.
The Carolina chickadee was often placed in the genus Parus with most other tits, but mtDNA cytochrome b sequence data and morphology suggest that separating Poecile more adequately expresses these birds' relationships.[2] The American Ornithologists' Union has been treating Poecile as distinct genus since 1998.[3] Although it and the black-capped chickadee most likely diverged about 2.5 million years ago, the birds still hybridize in the areas where their ranges overlap.[4] The offspring of mated pairs of hybrid chickadees suffer from lower hatching success, and a male bias sex ratio, consistent with Haldane's rule.[5]
Adults are 11.5–13 cm (4.5–5.1 in) long with a weight of 9–12 g (0.32–0.42 oz), and have a black cap and bib with white sides to the face. Their underparts are white with rusty brown on the flanks; their back is grey. They have a short dark bill, short wings and a moderately long tail. Very similar to the black-capped chickadee, the Carolina chickadee is distinguished by the slightly browner wing with the greater coverts brown (not whitish fringed) and the white fringing on the secondary feathers slightly less conspicuous; the tail is also slightly shorter and more square-ended. Without calls, visual distinction between the two species is very difficult even with an excellent view.
Eggs are about 1.5 cm (0.6 in) long and 1.1 cm (0.4 in) wide. Eggs are white with areas of reddish-brown ranging from dots to small blotches.[4]
The calls and song between the Carolina chickadee and the black-capped chickadee differ subtly to an experienced ear: the Carolina chickadee's chick-a-dee call is faster and higher pitched than that of the black-capped chickadee, and the Carolina chickadee has a four note fee-bee-fee-bay song, whereas the black-capped omits the high notes.[6]
The most famous call is the familiar chick-a-dee-dee-dee which gave this bird its name and its song is fee-bee-fee-bay.
Their breeding habitat is mixed or deciduous forests in the United States from New Jersey and Pennsylvania west to southern Kansas and south to Florida and Texas; there is a gap in the range at high altitudes in the Appalachian Mountains where they are replaced by their otherwise more northern relative, the black-capped chickadee.
They are permanent residents, not usually moving south even in severe winter weather.
These birds hop along tree branches searching for insects, sometimes hanging upside down or hovering; they may make short flights to catch insects in the air. Insects form a large part of their diet, especially in summer; seeds and berries become important in winter. They sometimes hammer seeds on a tree or shrub to open them; they also will store seeds for later use. Carolina chickadees commonly make use of feeders.[4]
During the fall migration and winter, chickadees often flock together in flocks of 8–10 birds. Each of the birds in a flock has a rank; while highly ranked birds will remain on the flock's territory for breeding, lower-ranked birds must find new breeding territory. Many other species of birds, including titmice, nuthatches, and warblers can often be found foraging in these flocks. Mixed flocks occur about 50% of the time. Mixed flocks stay together because the chickadees call out whenever they find a good source of food. This calling out forms cohesion for the group, allowing the other birds to find food more efficiently.[4]
Carolina chickadees actively defend individual spaces of 2–5 ft (0.6–1.5 m) apart; if another bird encroaches on these spaces, the dominant bird may make gargle calls. At feeders, these birds will usually take a seed and fly to a branch isolated from other birds to eat it.[4]
These birds usually sleep in cavities, though they may sleep in branches. Different members of a flock will sleep in the same cavity from night to night. While females usually sleep in the nest cavity, males will normally sleep on a nearby branch.[4]
They nest in a hole in a tree; the pair excavates the nest, using a natural cavity or sometimes an old woodpecker nest. They may interbreed with black-capped chickadees where the ranges overlap, which can make identification even more difficult. The female will build the nest out of moss and strips of bark; she will then line it with hair or plant fibers. Clutches are usually made up of 3–10 eggs with an incubation period of 12–16 days. The nestling period is usually 16–19 days.[4]
Carolina chickadees are able to lower their body temperatures to induce an intentional state of hypothermia called torpor. They do this to conserve energy during extremely cold winters. In extremely cold weather conditions they look for cavities where they can hide in and spend up to fifteen hours at a time in torpor; during this time they are awake but unresponsive; they should not be picked up and handled at this time, as the stress of being held may cause death.[7]
