| 词条 | Great woodswallow |
| 释义 |
| name = Great woodswallow | image = Great Woodswallow.jpg | status = LC | status_system = IUCN3.1 | status_ref = [1] | genus = Artamus | species = maximus | authority = Meyer, 1874 | synonyms = }} The great woodswallow (Artamus maximus), also known as the greater woodswallow, giant woodswallow or New Guinea woodswallow is a species of bird in the family Artamidae. As its name implies, it is the largest member of the genus Artamus, averaging {{convert|20|cm|in|2}} in length and {{convert|61|g|oz|1}} in mass.[2] In appearance the great woodswallow is very similar to the more widespread white-breasted woodswallow but can be distinguished by its darker black upper side plumage and by the presence of a semi-oval black patch below the throat.[3] Distribution and habitatThe great woodswallow occurs naturally in tropical moist montane forest, usually amongst clearings with dead trees, most typically dead emergents above the canopy of primary rainforest. Although the species has been known to be common ever since the first Western explorers of New Guinea,[4] it has adapted very well to human manipulation of the landscape and is especially common near Highland towns such as Mount Hagen and Goroka.[3] Great woodswallows are found as high as {{convert|3000|m|ft|-2}}, but are most abundant between {{convert|1000|m|ft|-2}} and {{convert|2500|m|ft|-2}}. Unlike the Australian dusky woodswallow,[5] great woodswallows do not reduce their body temperature on cool nights.[2] Behaviour and breedingLike its smaller relatives, the great woodswallow is a fast-flying aerial insectivore feeding chiefly on large flying insects. It is generally regarded as the smallest bird in the world that habitually soars on updrafts over long distances, but it will also use its feet to manipulate its insect prey. Great woodswallows are highly social, flying in flocks of up to twenty birds, and nomadic over their montane forest habitat.[3] It is common for very close “knots” of the species to allopreen on small posts for up to ten minutes. They usually breed between August and December, and the nest is like other woodswallows: a flat platform of grass or twigs in a tree hole or stump, though higher above the ground than other species in the genus.[3] Great woodswallows are cooperative breeders, with most young adults remaining for a number of years with their parents to raise young. References1. ^{{IUCN|id=22706311 |title=Artamus maximus |assessor=BirdLife International |assessor-link=BirdLife International |version=2013.2 |year=2012 |accessdate=26 November 2013}} {{Taxonbar|from=Q794776}}{{DEFAULTSORT:woodswallow, great}}2. ^1 McNab, Brian K.; “Ecological Energetics of Birds in New Guinea”; in Bulletin of Florida Museum of Natural History, vol. 52(2); pp. 96-159 3. ^1 2 3 Coates, Brian J.; The Birds of Papua New Guinea Including the Bismarck Archipelago and Bougainville: Volume 2 - Passerines; pp. 373-375. {{ISBN|0959025715}} 4. ^Sclater, P.L.; “On Recent Ornithological Progress in New Guinea”; in Ibis Volume 18, Issue 2 (April 1876), pp. 243–259 5. ^Maddocks, Tracy A. and Geiser, Fritz; “Heterothermy in an Australian passerine, the Dusky Woodswallow (Artamus cyanopterus)”; in Journal of Ornithology, Volume 148, Issue 4(October 2007); pp. 571-577 4 : Artamus|Birds of New Guinea|Birds described in 1874|Taxonomy articles created by Polbot |
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