Bay-breasted Warbler
Setophaga castanea
Breeding males are distinctive with dark reddish-brown cap and sides, along with buffy nape. Two bold white wingbars. Females and fall birds are duller; most show at least some chestnut coloring on sides. Dullest birds are similar to Blackpoll and Pine Warblers; look for streaks on back, well-defined wingbars, and cleaner greenish-yellow head and neck. Prefers conifers during migration, but can be found in any woodland. Breeds in the boreal forest. In most of U.S. , only seen during migration. Winters in Central and South America. Listen carefully for extremely high-pitched, squeaky-wheel song, similar to a fast Black-and-white Warbler.
识别特征
Adult males in breeding plumage are primarily grayish above, with two white wing bars, dark streaks on the back, and a creamy neck patch. The face is black, and the crown, throat, and sides are a dark chestnut color. Breeding females are similar in overall pattern to the males, but are paler and duller. In the nonbreeding season, both sexes gain olive-green feathers on the back, nape, and head. The rufous on the flanks is limited and may even fade away entirely in nonbreeding females. The two white wing bars are present in all plumages.<p>
分类信息
- 学名
- Setophaga castanea
- 命名信息
- (Wilson, A, 1810)
- 目
- Passeriformes
- 科
- Parulidae
- 属
- Setophaga
分布与栖息地
Bay-breasted warblers breed in the boreal spruce-fir forests of eastern and central Canada, as well as the extreme northern United States. The species winters in the wet lowland forests of northeastern South America, the Caribbean, and southern Central America, and may be seen during spring and fall migration across the eastern half of the United States in a variety of vegetative communities. Many individuals cross the Gulf of Mexico on their long-distance migration, although some travel north and south along the Mexican shore.
- 繁殖区
- NA : s, se Canada and ne USA
- 非繁殖区
- to nw SA
- 迁徙
- Complete migrants
保护状况
Although currently classified by the IUCN as least concern, bay-breasted warblers, like many songbirds, are facing population declines across their range. A loss of insect prey and global climate change are contributing factors to decline. The global population is estimated to be fewer than 10 million individuals.
- 种群趋势
- rising
照片
分布
鸟叫声
其他鸟类
Dusky Sunbird
Cinnyris fuscus
A small sunbird. The male is dark overall, with a pale lower belly and orange tufts at the shoulder that are sometimes hidden. The female is plain gray-brown with a paler lower belly. Singles and pairs prefer arid scrub and savanna, feeding on insects and nectar. The species is nomadic and can irrupt in large numbers into areas where it is normally irregular, often on the fringes of its range. The female Dusky Sunbird has paler underparts than the similar female Southern Double-collared Sunbird.
Piping Woodcreeper
Deconychura typica
Fairly small, warm brown woodcreeper with buffy spots on breast and vague buffy eyebrow. Note relatively short, straight bill. Very similar to many other species of woodcreepers but smaller than most others in range; tail relatively longer than most other woodcreepers but this is of limited use in field identification. Focus on overall shape, especially the vaguely “pin-headed” look and scruffy feathers on the nape. Generally found in primary forest, usually following a mixed-species flock. Best identified by voice, though not a particularly vocal species. Song is a long, fast series of medium-pitched piping notes that at first speed up and then slow down at the end of the phrase.
Gray-breasted Sabrewing
Campylopterus largipennis
Large hummingbird of humid forests and semi-open habitats in Amazonia. Plain gray below and iridescent green above. Note large dark tail with white tips; also look for fairly heavy, slightly dropped bill and white spot behind eye. Occurs mostly in forest clearings or other semi-open habitats such as edges, tree fall gaps, and gardens. Forages at low- to mid-levels.
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