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The inside of a tree swallow nest A male gathering nesting material. The tree swallow has high rates of extra-pair paternity, 38% to 69% of nestlings being a product of extra-pair paternity, and 50% to 87% of broods containing at least one nestling that was the result of an extra-pair copulation. [14]
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 ...
Tree martins also occasionally reline the nests of welcome swallows, and may displace the owners to obtain the nest. The nest, unusually for a cliff swallow, is often made just from grass and leaves, but may be reinforced with mud. A mud and plant fibre cement is also used to reduce the width of the entrance to the breeding hole.
Violet-green swallows are secondary cavity nesters, meaning they typically nest in natural holes or previously occupied nests. [15] [16] Some breeding pairs will even go as far as usurping nests from other species. [17] A majority of violet-green swallow nests are in tree holes excavated by other animals or within the cracks of large cliffs.
The sand martin is sociable in its nesting habits; from a dozen to many hundred pairs will nest close together, according to available space. The nests are at the end of tunnels ranging from a few inches to three or four feet in length, bored in sand or gravel. The actual nest is a litter of straw and feathers in a chamber at the end of the ...
The other four are more widespread, with winter ranges covering much of the Southern Hemisphere. [4] The barn swallow is a bird of open country that normally nests in man-made structures and consequently has spread with human expansion. It builds a cup nest from mud pellets in barns or similar structures and feeds on insects caught in flight. [5]
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 ...
Delichon urbicum. The western house martin (Delichon urbicum), sometimes called the common house martin, northern house martin or, particularly in Europe, just house martin, is a migratory passerine bird of the swallow family which breeds in Europe, north Africa and across the Palearctic; and winters in sub-Saharan Africa and tropical Asia.