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The tree swallow lays a clutch of two to eight, although usually four to seven, [14] pure white, and translucent at laying, eggs that measure about 19 by 14 mm (0.75 by 0.55 in). [53] These eggs are incubated by the female, [14] usually after the second-to-last egg is laid, [54] for 11 to 20 days, [53] although most hatch after 14 to 15 days.
Tree swallow: north-central Alaska and up to the tree line in Canada and as far south as Tennessee in the eastern part of its range, California and New Mexico in the west, and Kansas in the centre Tachycineta cyaneoviridis: Bahama swallow: northern Bahamas: Andros, Grand Bahama, Abaco, and New Providence Tachycineta thalassina: Violet-green swallow
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 barn swallow is similar in its habits to other aerial insectivores, including other swallow species and the unrelated swifts. It is not a particularly fast flier, with a speed estimated at 11 m/s (40 km/h), up to 20 m/s (72 km/h) and a wing beat rate of approximately 5, up to 7–9 times each second.
A tree swallow attending its nest in a tree cavity. Swallows are excellent flyers and use these skills to feed and attract mates. Some species, such as the mangrove swallow, are territorial, whereas others are not and simply defend their nesting sites. In general, the male selects a nest site, and then attracts a female using song and flight ...
The western house martin is similar in habits to other aerial insectivores, including other swallows and martins and the unrelated swifts, and catches insects in flight. [9] In the breeding areas, flies and aphids make up much of the diet, and in Europe, the house martin takes a larger proportion of aphids and small flies than the barn swallow. [9]
Rarely, they will come to the ground to eat insects. They usually fly relatively high, so, contrary to popular opinion, mosquitoes do not form a large part of their diet. [ 3 ] Research published in 2015, however, does indicate that the purple martin feeds on invasive fire ants ( Solenopsis invicta ) and that they may make up a significant ...
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.