Illustration © David Allen Sibley.
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Text © Kenn Kaufman, adapted from
Lives of North American Birds
Photo: Greg W. Lasley/Vireo
Chaetura pelagica
Conservation status | Probably increased greatly in numbers after adapting to nesting in chimneys, much more readily available than hollow trees. In recent decades it has declined in some areas, but still widespread and common. |
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Family | Swifts |
Habitat | Open sky, especially over cities and towns. Forages in the sky over any kind of terrain, wherever there are flying insects. Now most common over towns and cities; within its range, few forests remain with hollow trees large enough to serve as nest sites. |
Forages only while flying, pursuing insects and scooping them out of the air. Often flies high but will forage very low during wet weather. Typically seen foraging in small flocks.
4-5, sometimes 3-6. White. Incubation is by both parents, 19-21 days. Young: Both parents feed young, by regurgitating insects. Young may climb out of nest after about 20 days, creeping up vertical walls. Age of young at first flight about 28-30 days.
Both parents feed young, by regurgitating insects. Young may climb out of nest after about 20 days, creeping up vertical walls. Age of young at first flight about 28-30 days.
Flying insects. Feeds on a wide variety of insects, including beetles, flies, true bugs, and moths; also spiders. Will concentrate at times on swarming insects, such as emergences of winged adult ants.
Courtship involves aerial displays; in one display, two birds fly close together, one following the other, both gliding with wings held up in V. Breeding pair is often assisted by an extra adult "helper." Nest site is inside a chimney or similar hollow tower, usually well down from opening, in a well-shaded area. Originally nested (and sometimes still does) inside large hollow trees. Nest (built by both sexes) is shaped like half a saucer, made of twigs glued together with the birds' saliva. Adults break off short dead twigs while zooming past in flight.
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