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The barn swallow (Hirundo rustica) is the most widespread species of swallow in the world, occurring on all continents, with vagrants reported even in Antarctica. [2] [3] It is a distinctive passerine bird with blue upperparts and a long, deeply forked tail.
An artificial purple martin nesting colony The barn swallow is the national bird of Estonia. [48] They also are one of the most depicted birds on postage stamps around the world. [49] [50] [51] Swallows coexist well with humans because of their beneficial role as insect eaters, and some species have readily adapted to nesting in and around ...
The common swift (Apus apus) is a medium-sized bird, superficially similar to the barn swallow or house martin but somewhat larger, though not stemming from those passerine species, being in the order Apodiformes. The resemblances between the groups are due to convergent evolution, reflecting similar contextual development.
The wire-tailed swallow is a small swallow, measuring 18 cm (7.1 in) in length. It has bright blue upperparts, bright white underparts and a chestnut cap. Immature birds lack tail wires, and have dull brown (rather than chestnut) caps. [4] The species is named for the very long filamentous outermost tail feathers, which trail behind like two wires.
A pellet, in ornithology, is the mass of undigested parts of a bird's food that some bird species occasionally regurgitate. The contents of a bird's pellet depend on its diet, but can include the exoskeletons of insects, indigestible plant matter, bones, fur, feathers, bills, claws, and teeth.
The violet-green swallow (Tachycineta thalassina) is a small North American passerine bird in the swallow family. These aerial insectivores are distributed along the west coast from Alaska to Mexico , extending as far east as Montana and Texas .
The northern rough-winged swallow usually nests by itself, [5] although sometimes it is found in loose groups, often at the edge of bank swallow colonies, [6] of up to 25 pairs. [5] The nests are found in burrows located in soil banks, [ 12 ] very occasionally caves and trees, and in human-made cavities such as gutters and tubes.
The red-chested swallow (Hirundo lucida) is a small non-migratory passerine bird found in West Africa, the Congo Basin and Ethiopia. It has a long, deeply forked tail and curved, pointed wings. [2] It was formerly considered a subspecies of the closely resembling barn swallow.