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Thus, unmonitored purple martin houses are often overtaken by more aggressive, non-native species. [3] Purple martin proponents are motivated by the concern that the purple martin would likely vanish from eastern North America were it not for this assistance. [24] There is a misconception among many people regarding purple martin's temperament.
Delichon is a small genus of passerine birds that belongs to the swallow family and contains four species called house martins.These are chunky, bull-headed and short-tailed birds, blackish-blue above with a contrasting white rump, and with white or grey underparts.
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.
Purple martins are now being spotted in Pennsylvania. The swallows spend the winter months in Brazil and migrate north for spring and summer. Purple martins are making their 7,000 mile trip to ...
The Purple Martin Conservation Association tracks the arrival of the birds with the help of about 3,500 volunteers. A smaller group of about 220 volunteers monitors the nests. For more information ...
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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.
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