Semipalmated Plover
Charadrius semipalmatus
Small, orange-legged plover with solid dark breast band. Medium-brown upperparts are the color of wet sand, noticeably darker than Piping or Snowy Plovers. Look for short, blunt bill with orange base (often indistinct on juveniles). Feeds on mudflats and beaches, often mixed with other shorebirds. Even when in a flock, individuals are typically spread out rather than remaining a tight unit. Breeds on the tundra or rocky beaches at northern latitudes; winters to southern South America. Migrants are common and widespread, inland and coastal. Listen for distinctive two parted “chu-weep!” calls, and assorted chortles and chuckles.
识别特征
This species weighs 22–63 g (0.78–2.22 oz) and measures 14–20 cm (5.5–7.9 in) in length and 35–56 cm (14–22 in) across the wings. Adults have a grey-brown back and wings, a white belly, and a white breast with one black neckband. They have a brown cap, a white forehead, a black mask around the eyes and a short orange and black bill.
分类信息
- 学名
- Charadrius semipalmatus
- 命名信息
- Bonaparte, 1825
- 目
- Charadriiformes
- 科
- Charadriidae
- 属
- Charadrius
分布与栖息地
Their breeding habitat is open ground on beaches or flats across northern Canada and Alaska. They nest on the ground in an open area with little or no plant growth.<p>They are migratory and winter in coastal areas of the southern United States, the Caribbean and much of South America. They are extremely rare vagrants to western Europe, and have been found in Tierra del Fuego and the Isles of Scilly. Their true status may be obscured by the difficulty in identifying them from the very similar ringed plover of Eurasia, of which it was formerly considered a subspecies.
- 繁殖区
- NA : inland high Arctic to extreme ne Russia and subarctic Alaska and Canada: e Chukotskiy Pen. (ne Russia), c, e Aleutian Is., all Alaskan mainland and nw British Columbia to Banks and Baffin is., s to w James Bay, Newfoundland and Nova Scotia (nw to ne, se Canada)
- 非繁殖区
- coastal from Oregon and New Jersey (nw, ec USA) s to n Chile and ec Argentina; also Bermuda, throughout West Indies and Galápagos
- 迁徙
- Complete migrants
行为
Semipalmated plovers forage for food on beaches, tidal flats and fields, usually by sight. They eat insects (such as the larvae of long-legged and beach flies, larvae of soldier flies and shore flies, mosquitoes, grasshoppers and Ochtebius beetles), spiders, crustaceans (such as isopods, decapods and copepods) and worms (such as polychaetes). They also consume small molluscs including bivalves and gastropods, including snails such as coffee bean snails and Odostomia laevigata. These opportunistic feeders also feed on berries or seeds from grasslands or cultivated fields. This bird resembles the killdeer but is much smaller and has only one band. Since the semipalmated plover nests on the ground, it uses a "broken-wing" display to lure intruders away from the nest, in a display similar to the related killdeer.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
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Large and gangly seabird that nests only in Galápagos and on Isla de la Plata (a small island near Ecuador’s central coast). When not breeding, it disperses over the eastern Pacific Ocean as far south as Chile. The only albatross likely to be seen in and near Galápagos. Adult is brown with a white head and neck and a large, yellow bill. Head and neck have a slight yellow tinge. Young birds are almost all brown and gradually develop the white head. Can be seen on land only at nesting sites, where pairs engage in elaborate courtship displays. Outside of the breeding season, it is usually only encountered far out to sea.
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Unmistakable in range. Odd-looking duck with a long thin bill, dark green head, and spiky crest. In flight, exhibits white wing panels. It is a very rare inhabitant of precious few fast-flowing clearwater rivers with abundant fish, which it catches by diving.
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