Black-throated Green Warbler
Setophaga virens
Bright yellow face with olive cheeks, crown, and back. Only breeding males have solid black throat. In all plumages, look for dark streaks on white flanks and yellow wash on vent. Breeds in mixed coniferous forests; migrants can be found in any wooded habitat, usually with tall trees. Winters primarily in Central America and the Caribbean, rarely into northern South America. Compare especially with Townsend’s Warbler on the wintering grounds, but Black-throated Green has a less contrasting face pattern (especially paler crown and cheeks) and less yellow on breast.
识别特征
It has an olive-green crown, a yellow face with olive markings, a thin pointed bill, white wing bars, an olive-green back and pale underparts with black streaks on the flanks. Adult males have a black throat and upper breast; females have a pale throat and black markings on their breast.<p>Measurements:
分类信息
- 学名
- Setophaga virens
- 命名信息
- (Gmelin, JF, 1789)
- 目
- Passeriformes
- 科
- Parulidae
- 属
- Setophaga
分布与栖息地
The breeding habitat of the black-throated green warbler is coniferous and mixed forests in eastern North America and western Canada and cypress swamps on the southern Atlantic coast. These birds' nests are open cups, which are usually situated close to the trunk of a tree.<p>These birds migrate to Mexico, Central America, the West Indies and southern Florida. One destination is to the Petenes mangroves of the Yucatán. Some birds straggle as far as South America, with the southernmost couple of records coming from Ecuador.
- 繁殖区
- NA : c Canada to se Canada and ne, e and nc USA
- 非繁殖区
- Mexico to n SA and West Indies
- 迁徙
- Complete migrants
行为
Black-throated green warblers forage actively in vegetation, and they sometimes hover (gleaning), or catch insects in flight (hawking). Insects are the main constituents of these birds' diets, although berries will occasionally be consumed.<p>The song of this bird is a buzzed zee-zee-zee-zooo-zeet or zoo-zee-zoo-zoo-zeet. The call is a sharp tsip.<p>This bird is vulnerable to nest parasitism by the brown-headed cowbird.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Sharp-shinned Hawk
Accipiter striatus
Small hawk with relatively short rounded wings. Adults are gray above with pale orange barring below; immatures are browner and streaky. Very similar to Cooper's Hawk, especially in plumage, but smaller overall with smaller head, more squared-off tail, and more petite feet. Also note quicker, snappier wingbeats. Breeds in extensive forests. Feeds mainly on birds captured in flight. Often stalks feeders in search of prey.
Ferruginous Partridge
Caloperdix oculeus
Flamboyantly plumaged little gamebird, with pumpkin-orange head and breast, brown wings, and smart black-and-white scaling on back and sides. Listen for its exuberant song, a series of accelerating whistles that eventually collapses into harsh, coarse notes, as though its voice had broken. Inhabits lowlands and middle-elevation forests, where it can be difficult to see as it forages on the ground, typically singly or in pairs; most readily seen at established feeding stations.
Cameroon Indigobird
Vidua camerunensis
A nest parasite that lays its eggs in the nests of African and Black-bellied Firefinches and Brown and Dybowski's Twinspots. Breeding males are glossy black with blue iridescence and a pale brownish panel in the wings. Females and non-breeding males are streaky and brown on the back and pale below, with a bold facial pattern. The bill is whitish and the legs very pale purplish. Found locally in lush woodland, savanna, and cultivated areas. Given current knowledge, can only be confidently identified by mimicked vocalizations. Each male parasitizes only one of the four host species and imitates its vocalizations, often mixing them into a scratchy jumble of high-pitched notes.
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