Wilson's Plover
Anarhynchus wilsonia
Large black bill is diagnostic. Slightly larger than similar plovers, with large blocky head. Breeding plumage shows thick black band across breast, white forehead, and bolder face pattern; nonbreeding birds show less contrast. Legs dull pinkish. Found on sandy beaches, usually singly but sometimes in small loose flocks. Medium-brown upperparts similar but slightly paler than Semipalmated Plover, notably darker than Snowy or Piping.
识别特征
The breeding male has a black breast band, lores and forecrown, and a rufous mask. Females and non-breeding males have a similar plumage, but the black of the breeding male is replaced by brown or rufous. Non-breeders have a greyer tint to the head and breast band.Immature birds are similar to the female, but the breast band is often incomplete. The adult's upper parts are mainly dark grey, with a short white wing bar and white tail sides. The underparts are white except for a breast band, and the legs are pink, brighter when breeding. The dark bill is large and heavy for a plover of this size. The call is a high weak whistle.<p>Measurements:
分类信息
- 学名
- Anarhynchus wilsonia
- 命名信息
- (Ord, 1814)
- 目
- Charadriiformes
- 科
- Charadriidae
- 属
- Anarhynchus
分布与栖息地
It is a partial migrant. Birds leave the United States, except Florida, to winter south in Brazil. Some Mexican birds leave in winter for Peru. Furthermore, a small resident population is known from Brazil, it being named as a new subspecies, brasiliensis, in 2008. In 2012 it was established that this is a junior synonym, and the correct name for the subspecies is crassirostris. This also means that one of the subspecies of the greater sand plover had to be renamed.<p>This strictly coastal plover nests on a bare scrape on sandy beaches or sandbars.
- 迁徙
- Complete migrants
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Black-billed Treehunter
Thripadectes melanorhynchus
Rather dull, brownish bird found in cloud forest along the east slope of the Andes. Brown with faint buff streaking on head, throat, and breast. Throat is scaled buffy, and tail is rusty. Lack of distinct streaking on lower underparts helps distinguish it from other similar species in range. Usually seen foraging along branches at low to medium heights. Typical song is a series of two to six strident notes; a longer series may be given if the bird is excited.
Yellow-billed Kingfisher
Syma torotoro
Small green kingfisher with orange head and bright yellow bill, found in wet rainforest on Cape York Peninsula and in New Guinea. In flight, note uniformly colored wings (no wing spots). Adult female has small black cap. Juvenile similar to adult but with black bill. Call a rolling, descending trill, rather like call of Fan-tailed Cuckoo.
Black Scoter
Melanitta americana
Plump diving duck, typically seen in flocks in coastal areas. Males are completely black with bright orange knob on the bill. Females are brown overall with pale cheek and contrasting dark cap. Note potbellied shape and rounded head in flight. Typically coastal, but migrates over land especially in the Northeast U.S. Often gathers in tight flocks. Dives frequently, feeding on aquatic invertebrates. Breeds on ponds in Arctic tundra.
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