Stilt Sandpiper
Calidris himantopus
Medium-sized sandpiper with long legs and bill. Shaped like a tall, stretched-out Dunlin. Breeding plumage is striking with extensive messy black-and-white barring, white eyebrow, and orange cheek. Nonbreeding is plain pale gray with contrasting white eyebrow. Juveniles usually show pale buffy tones on the head and neck and have an attractive scaly pattern on the upperparts. At all ages, note long, slightly droopy bill and dull yellowish-green legs. In flight, look for pale tail and white rump. Breeds on Arctic tundra in Canada and Alaska. Common migrant through central North America; uncommon to rare on both coasts. During migration and winter, found in shallow wetlands, including marshes, flooded fields, and muddy ponds. Usually wades in the water while feeding, often mixed with yellowlegs and dowitchers.
识别特征
This species resembles the curlew sandpiper in its curved bill, long neck, pale supercilium and white rump. It is readily distinguished from that species by its much longer and paler legs, which give rise to its common and scientific names. It also lacks an obvious wing bar in flight. Breeding adults are distinctive, heavily barred beneath, and with reddish patches above and below the supercilium. The back is brown with darker feather centres. Winter plumage is basically gray above and white below.Juvenile stilt sandpipers resemble the adults in their strong head pattern and brownish back, but they are not barred below, and show white fringes on the back feathering.<p>Measurements:
分类信息
This sandpiper bears some resemblance to the smaller calidrid sandpipers or "stints". DNA sequence information is incapable of determining whether it should be placed in Calidris or in the monotypic genus Micropalama. It appears most closely allied with the curlew sandpiper, which is another aberrant species only tentatively placed in Calidris and could conceivably be separated with it in Erolia.
- 学名
- Calidris himantopus
- 命名信息
- (Bonaparte, 1826)
- 目
- Charadriiformes
- 科
- Scolopacidae
- 属
- Calidris
分布与栖息地
- 繁殖区
- NA : high and low Arctic tundra to taiga edge of n Nearctic: North Slope of Alaska and n Canada to s Victoria I. (nc Canada); also locally w coasts of Hudson and James bays
- 非繁殖区
- coastal and inland Mexico and throughout the West Indies; in Central America mainly along Pacific coast; coastal South America to Peru and n Brazil, and in pampas of nc Argentina
- 迁徙
- Complete migrants
保护状况
- 种群趋势
- rising
照片
分布
鸟叫声
其他鸟类
Blue-headed Coucal
Centropus monachus
Huge coucal with a hefty bill. The head often looks black, but can show a blue sheen. Found close to water in marshes, swamps, and wet scrub. Fairly skulking, though occasionally seen in the open. Massive size is obvious in flight. The call is a slow, deep version of the typical coucal descending and accelerating series of “boop” notes. Very similar to Coppery-tailed Coucal, but there is virtually no overlap in range, and Blue-headed is smaller, with a blue sheen to the head. Similar coloration to Senegal Coucal, but much larger.
Plain-capped Ground-Tyrant
Muscisaxicola alpinus
Dingy, terrestrial flycatcher found only at very high elevations in the Andes. It has brown upperparts, white underparts, and a white eyebrow. Crown may show a brown tinge, but never bright chestnut like on some other ground-tyrants. Inhabits open areas away from forest. Stands vertically on the ground or a low perch, frequently flicking wings and tail, before suddenly darting after insects and other small prey.
Woodford's Rail
Gallirallus woodfordi
A very dark short-tailed rail, often appearing entirely black. Dark brown on the wings and back, with black on the neck, head, and underparts. Bill yellowish or gray. Flightless. Occurs in damp lowland grassland and grassy thickets within forest. Sounds include a series of sharp yelping and squealing “kik-kik” noises.
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