Least Sandpiper
Calidris minutilla
Tiny brownish sandpiper. At all ages, most easily distinguished from other small sandpipers by darker, more brownish coloration. Juveniles are particularly bright with rusty tones on the upperparts. Also note fine-tipped bill and yellowish legs, but beware legs can be covered with dark mud and other peeps (like Semipalmated Sandpiper) can rarely show slightly greenish legs. Habitat and behavior are helpful supporting clues, too. Typically forages in a crouched posture with bent legs, picking for invertebrates in the mud. Often in small loose groups, but not in large, tight flocks like Semipalmated or Western Sandpipers. Prefers drier mud, often on the higher edges of mudflats or small patches of water in marshes. Widespread and common, especially inland. Breeds in various wetland habitats throughout Alaska and Canada. Winters from the southern U.S. to South America. Listen for high-pitched, rolling “greeep!” calls.
识别特征
This species has greenish legs and a short, thin, dark bill. Breeding adults are brown with dark brown streaks on top and white underneath. They have a light line above the eye and a dark crown. In winter, Least sandpipers are grey above. The juveniles are brightly patterned above with rufous coloration and white mantle stripes.<p>This bird can be difficult to distinguish from other similar tiny shorebirds; these are known collectively as "peeps" or "stints". In particular, least sandpiper is very similar to its Asian counterpart, long-toed stint. It differs from that species in its more compact, shorter-necked appearance, shorter toes, somewhat duller colors, and stronger wingbar.<p>Measurements:
分类信息
- 学名
- Calidris minutilla
- 命名信息
- (Vieillot, 1819)
- 目
- Charadriiformes
- 科
- Scolopacidae
- 属
- Calidris
分布与栖息地
- 繁殖区
- NA : low Arctic and subarctic n Nearctic tundra and taiga wetlands: e Aleutian Is., all Alaskan mainland, n Canada from n Yukon to n British Columbia, e to s James Bay, Ungava Pen., Labrador and Nova Scotia
- 非繁殖区
- subtropical to tropical coastal mudflats and inland wetlands from s USA, Caribbean, and Mexico to n South America
- 迁徙
- Complete migrants
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
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Humboldt's Sapphire
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