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The ospreys are alerted to the presence of these predators by the alarm calls of the swallows. [37] Barn swallows will normally raise two broods, with the original nest being reused for the second brood and being repaired and reused in subsequent years. The female lays two to seven, but typically four or five, reddish-spotted white eggs. [7]
[39] [40] In barn swallows, old mated males and young unmated males benefit from colonial behaviour, whereas females and mated young males likely benefit more from nesting by themselves. [ 41 ] Pairs of mated swallows are monogamous, [ 42 ] and pairs of nonmigratory species often stay near their breeding area all year, though the nest site is ...
The bird genus Hirundo is a group of passerines in the family Hirundinidae (swallows and martins). The genus name is Latin for a swallow. [1] These are the typical swallows, including the widespread barn swallow. Many of this group have blue backs, red on the face and sometimes the rump or nape, and whitish or rufous underparts. With fifteen ...
The cliff swallow or American cliff swallow (Petrochelidon pyrrhonota) is a member of the passerine bird family Hirundinidae, the swallows and martins. [2] The generic name Petrochelidon is derived from the Ancient Greek petros meaning "stone" and khelidon (χελιδών) "swallow", and the specific name pyrrhonota comes from purrhos meaning "flame-coloured" and -notos "-backed".
Apocrita (wasps, bees and ants) Hymenoptera is a large order of insects , comprising the sawflies , wasps , bees , and ants . Over 150,000 living species of Hymenoptera have been described, [ 2 ] [ 3 ] in addition to over 2,000 extinct ones. [ 4 ]
In Britain, the sand martin is the first of its family to appear on its breeding grounds, arriving from the middle of March, a week or two in advance of the barn swallow. In northern Ohio , they arrive in numbers by mid-April, about 10 days earlier than they did 100 years ago.
The western house martin flies with a wing beat averaging 5.3 beats per second, which is faster than the wing beat of 4.4 beats per second for the barn swallow, [12] but the flight speed of 11 m/s (36 ft/s) is typical for hirundines. [13] The western house martin is a noisy species, especially at its breeding colonies.
Blue swallows feed on small, soft-bodied flies and other arthropods, catching them on the wing. [4] The blue swallow arrives on the breeding range at the end of September and constructs cup-shaped nests from mud and grass on the inside of sinkhole cavities, aardvark burrows and old mine shafts. The breeding system of the blue swallow is not ...