| 词条 | Short-billed dowitcher |
| 释义 |
| image = Limnodromus griseus.jpg | status = LC | status_system = IUCN3.1 | status_ref = [1] | taxon = Limnodromus griseus | authority = (Gmelin, 1789) | synonyms = *Scolopax grisea Gmelin, 1789 | range_map = Limnodromus griseus map.svg }} The short-billed dowitcher (Limnodromus griseus), like its congener the long-billed dowitcher, is a medium-sized, stocky, long-billed shorebird in the family Scolopacidae. The genus name Limnodromus is Ancient Greek from limne, "marsh" and dromos, "racer". The specific griseus is Medieval Latin for "grey".[2] The English name is from Iroquois and was first recorded in 1841.[3] It is an inhabitant of North America, Central America, and northern South America. It is strongly migratory; it completely vacates in breeding areas during the snow-bound months. This species favors a variety of habitats including tundra in the north to ponds and mudflats in the south. It feeds on invertebrates often by rapidly probing its bill into mud in a sewing machine fashion.[6] It and the very similar long-billed dowitcher were considered one species until 1950.[7] Field identification of the two American Limnodromus remains difficult today. Distinguishing wintering or juvenile short-billed dowitchers from the long-billed species is very difficult and, even given examination their subtlety different body shapes, cannot always be isolated to a particular species. They differ most substantially in vocalizations. The names of American dowitchers are misleading, as there is much overlap in their bill lengths.[6][7] Only a small percentage can be identified by this character alone.[7] DescriptionThe body of adults is dark brown on top and reddish underneath. The tail has a black and white barred pattern. The legs are a yellowish color. There are three subspecies with slight variations in appearance:
None of these combines the reddish belly and barred flanks of the breeding plumage long-billed dowitcher. The winter plumage is largely grey. This bird can range from {{convert|23|to|32|cm|in|abbr=on}} in length, {{convert|46|to|56|cm|in|abbr=on}} in wingspan and {{convert|73|-|155|g|oz|abbr=on}} in body mass.[11] The call of this bird is more mellow than that of the long-billed dowitcher, and is useful in identification, particularly of the difficult adult plumages. Breeding and habitatTheir breeding habitat includes bogs, tidal marshes, mudflats or forest clearings south of the tree line in northern North America. L. g. griseus breeds in northern Quebec; L. g. hendersoni breeds in north central Canada; L. g. caurinus breeds in southern Alaska and southern Yukon. These birds nest on the ground, usually near water. Their nests are shallow depressions in clumps of grass or moss, which are lined with fine grasses, twigs and leaves. They lay four, sometimes three, olive-buff to brown eggs. Incubation lasts for 21 days and is done by both sexes. The downy juvenile birds leave the nest soon after hatching. Parental roles are not well known, but it is believed the female departs and leaves the male to tend the chicks, which find all their own food. They migrate to the southern United States and as far south as Brazil. This bird is more likely to be seen near ocean coasts during migration than the long-billed dowitcher. This species occurs in western Europe only as an extremely rare vagrant. FeedingThese birds forage by probing in shallow water or on wet mud. They mainly eat insects, mollusks, crustaceans and marine worms, but also eat some plant material. References1. ^{{IUCN|id=22693344 |title=Limnodromus griseus |assessor=BirdLife International |assessor-link=BirdLife International |version=2013.2 |year=2012 |accessdate=26 November 2013}} [4][5][6]2. ^{{cite book | last= Jobling | first= James A | year= 2010| title= The Helm Dictionary of Scientific Bird Names | publisher=Christopher Helm | location = London | isbn = 978-1-4081-2501-4 | pages =179, 227}} 3. ^{{Cite OED |Dowitcher}} 4. ^1 2 {{cite book |last=Paulson |first=Dennis R. |title=Shorebirds of the Pacific Northwest |publisher=University of Washington Press |year=1993 |isbn=978-0295977065}} 5. ^1 2 3 {{cite book |last=Kaufman |first=Kenn |authorlink=Kenn Kaufman |title=Kaufman Field Guide to Advanced Birding |publisher=Houghton Mifflin Harcourt |year=1990 |isbn=978-0547248325 |series=Kaufman Field Guides}} 6. ^1 CRC Handbook of Avian Body Masses by John B. Dunning Jr. (Editor). CRC Press (1992), {{ISBN|978-0-8493-4258-5}}. }} External links{{Commons category|Limnodromus griseus}}{{Wikispecies|Limnodromus griseus}}
5 : Limnodromus|Native birds of Alaska|Birds of Canada|Shorebirds|Birds described in 1789 |
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