Orange-crowned Warbler
Leiothlypis celata
Nondescript warbler, generally olive-colored overall, but different populations vary from grayer to brighter yellow. Overall very plain and unmarked, but note short darkish line through eye and thin pale eye arcs. Forages for insects in scrubby areas, woodland edge, and thickets. Namesake orange crown is very difficult to see, and usually only a faint wash at best. More common in western North America, from Alaska to Mexico, where populations are brighter yellow-green. Birds in eastern North America are scarcer and drabber, often with a more contrasting grayish head. Bright yellow undertail coverts help separate Orange-crowned from the similarly drab Tennessee Warbler.
识别特征
The orange-crowned warbler has olive-grey upperparts, yellowish underparts with faint streaking and a thin pointed bill. It has a faint line over each eye and a faint broken eye ring. The orange patch on the crown is usually not visible. Females and immatures are duller in colour than males. Western birds are yellower than eastern birds. Orange-crowned warblers are distinguished by their lack of wing bars, streaking on the underparts, strong face marking or bright colouring, resembling a fall Tennessee warbler and a black-throated blue warbler, both of which are also members of the New World warbler family.<p>The song of is a trill, descending in pitch and volume. The call is a high chip.
分类信息
The orange-crowned warbler was formally described in 1822 by the American zoologist Thomas Say under the binomial name Sylvia celatus from a specimen collected on an expedition from Pittsburgh to the Rocky Mountains led by Stephen Harriman Long. The specific epithet celatus is Latin and means "secret" or "hidden". The type locality is Omaha, Nebraska. The orange-crowned warbler is now placed in the genus Leiothlypis that was introduced by the Dutch ornithologist George Sangster in 2008. The genus name is derived from the Ancient Greek λειος/leios meaning "plain" and θλυπις/thlupis, an unknown small bird mentioned by Aristotle.<p>Four subspecies are recognised:
- 学名
- Leiothlypis celata
- 命名信息
- (Say, 1822)
- 目
- Passeriformes
- 科
- Parulidae
- 属
- Leiothlypis
分布与栖息地
Their breeding habitat is open shrubby areas across Canada, Alaska and the western United States. These birds migrate in the winter to the southern United States and south to Central America. Although they are quite common in the western United States, they are uncommon in the east.
- 繁殖区
- NA : w, n
- 非繁殖区
- MA
- 迁徙
- Complete migrants
行为
The nest is a small open cup well-concealed on the ground under vegetation or low in shrubs. The female builds the nest; four to six eggs are laid in a nest on the ground or in a low bush. Both parents feed the young.<p>They forage actively in low shrubs, flying from perch to perch, sometimes hovering. These birds eat insects, berries and nectar.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Hunter's Cisticola
Cisticola hunteri
A large, plain cisticola with a reddish cap and two bands across the tail tip, one pale and one dark. Found in open montane habitats with thick herbaceous undergrowth, including forest edge, grassland, and heath, almost always in pairs or small groups. As with other cisticolas, habitat and vocalizations are important to identification. Very similar to Chubb’s Cisticola, but in the small area of overlap, Hunter’s occurs at higher elevations, and is distinguished by the softly streaked back and different vocalizations. Fairly similar to Singing Cisticola, but lacks a rufous panel in the wings. The distinctive song is given in chorus: a frantic series of spitting notes that runs up and down the scale, accompanied by simpler “cher-wee” calls.
Eurasian Siskin
Spinus spinus
Small yellowish finch with prominent wingbars. Male is attractive and distinctive, with a yellow face and breast offset by a black cap and small chin patch. Female streaky overall, often with yellowish tones; note especially the yellow wing and tail flashes of both sexes. Inhabits mixed and coniferous woodland and forest; also found in parks and gardens, and visits seed feeders. Often in flocks, mainly in the autumn and winter, gathering at good food sources. Listen for twittering, buzzing vocalizations, including nasal, rising “tuohweee” and dry chittering.
Northern Bobwhite
Colinus virginianus
Small and rotund with intricate brown, black, and white patterning. Some striking variation in plumage across range. Most males, including those in the eastern U.S., have bold black and white head pattern and heavy white spotting on belly. In Mexico, males can be entirely cinnamon-colored below and have a fully black head; some might have a white eyebrow or a dark chest band. Females are more consistent throughout range: look for buffy throat and eyebrow. Pairs or small groups are found in scrubby fields and brushy woods. Usually on the ground, but occasionally perches in trees when singing. The only quail native to the eastern U.S., where populations are declining sharply. Listen for distinctive “bob-WHITE!” whistle.
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