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With an average length of 20 cm (7.9 in) and a wingspan of up to 38 cm (15 in), the purple martin is the largest amongst the 90 odd species in the family Hirundinidae. [ 9 ] Measurement ranges : [ 10 ]
Just as the purple martin, this species may compete with other passerines for nesting cavities. In particular, the main foe is the house sparrow [ 4 ] in urban areas, where they mostly use man-made structures, whereas in more rural locations Picidae holes in coconut trees are favored, and there is less competition with the sparrows.
Delichon martins are 13–15 cm (5–6 in) long, ... The common house martin is the largest bird, with an average weight of 18.3 g (0.65 oz), and has the most deeply ...
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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.
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Just as the purple martin, this species may compete with other passerines for nesting cavities. In particular, the main foe is the house sparrow [1] in urban areas, where they mostly use man-made structures, whereas in more rural locations Picidae holes in coconut trees are favored, and there is less competition with the sparrows.
The Nepal house martin feeds on insects taken in flight, hunting along ridges or above treetops. The diet is not well known, but includes flies. [6] This bird is gregarious, feeding in flocks often with other aerial predators like the Himalayan swiftlet, [6] or other hirundines such as the barn swallow, striated swallow or common house martin. [16]
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