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The barn swallow will mob intruders such as cats or accipiters that venture too close to their nest, often flying very close to the threat. [60] Adult barn swallows have few predators, but some are taken by accipiters, falcons, and owls. Brood parasitism by cowbirds in North America or cuckoos in Eurasia is rare. [6] [37]
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 tree swallow is sometimes considered a model organism, due to the large amount of research done on it. An aerial insectivore, the tree swallow forages both alone and in groups, eating mostly insects, in addition to mollusks, spiders, and fruit. The nestlings, like the adult, primarily eat insects, fed to it by both sexes.
Violet-green swallow with a beak full of insects A female violet-green swallow feeding her chick from outside their tree hole nest. Similar to other swallows, violet-green swallows are specialized aerial insectivores, catching and eating their prey while in flight. However, they have been known to feed higher in the sky than most other swallows.
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.
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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. These burrows ...
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