Bicolored Wren
Campylorhynchus griseus
Large wren found in lowlands of northern South America. Striking plumage: rufous-brown above and clean white below with black crown and bold white eyebrow. Long tail has white tips. Unlike any other wren in range. Occurs in pairs and small family groups in open woodlands and scrubby habitats, often hopping around conspicuously in yards and gardens.
识别特征
The bicolored wren is the largest South American wren and second in size only to the giant wren overall in the family. It is 21 to 22 cm (8.3 to 8.7 in) long and weighs 37 to 46.5 g (1.31 to 1.64 oz). The sexes are similar. The nominate adults have dark chocolate crowns and napes and their upperparts a paler chocolate. An off-white supercilium separates a dark brown stripe through the eye from the crown and the rest of the face is also white. Their tail is dark brown; all of the tail feathers except the middle pair have a white band near the end. The throat and the entire underparts are white. C. g. albicilius is rustier than the nominate; so is bicolor but its rump is lighter. C. g. minor is smaller and its nape and upper back are blackish brown. C. g. pallidus is paler and more gray than the nominate and has a darker crown. The juveniles are grayer than the adults; their caps are mottled gray-brown and their underparts are grayish white.
分类信息
The bicolored wren has six subspecies:<p>It has sometimes been treated as conspecific with the giant wren (Campylorhynchus chiapensis) and might form a superspecies with it. Subspecies C. g. zimmeri has been considered to be an intergrade between albicius and the nominate griseus.
- 学名
- Campylorhynchus griseus
- 命名信息
- (Swainson, 1838)
- 目
- Passeriformes
- 科
- Troglodytidae
- 属
- Campylorhynchus
分布与栖息地
The subspecies of bicolored wren are distributed thus:<p>The bicolored wren inhabits areas with scattered trees and bushes and is completely absent from forests and wide open areas. C. g. bicolor occurs in arid thorn scrub and the other subspecies in significantly more humid areas. In elevation it ranges up to 2,100 m (6,900 ft) in Colombia and 1,600 m (5,200 ft) in Venezuela.
- 迁徙
- Resident species
行为
The bicolored wren forages in trees and on the ground. Its diet is primarily invertebrates, but it also eats vegetable matter such as berries.<p>The bicolored wren has two breeding seasons in Venezuela, January to March and May to August; its season in Colombia has not been determined. It is a cooperative breeder with blood relatives helping the nesting pair defend the nest and feed the young. The nest is a dome made of grass and other fibers and with a side entrance. It is placed high in a tree and is well concealed. The wren sometimes also uses old domed nests of other species. The clutch size is three to five.<p>The male bicolored wren's song is "a series of multiple loud gurgling notes" [1]. The female's is similar but includes a trill. The songs vary widely across the species' range. Its calls are "mostly harsh and grating" [2].
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Gray-hooded Flycatcher
Mionectes rufiventris
Small flycatcher that is largely olive above and cinnamon below with a gray head. The bill is two-toned with a pale base. Found in the understory of humid forests, second growth, and forests edges. Males may display in groups giving a low nasal “bayo” song.
Reischek's Parakeet
Cyanoramphus hochstetteri
A medium-sized, emerald-green parakeet endemic to the Antipodes Islands, including smaller outer islands. Recognized by its distinctive bright red crown and small red patches behind the eyes. Green body plumage has a slight yellowish tint. Males are larger than females. Most commonly found in areas of low vegetation and open areas along the coast. Forms small flocks in autumn and winter. Calls are a distinctive parakeet chatter. Distinguished from Red-crowned Parakeet by lack of range overlap and the more yellow-green body plumage. Easily distinguished from larger, all-green Antipodes Island Parakeet.
Yellow-crested Cockatoo
Cacatua sulphurea
A medium-sized white cockatoo with a yellow crest; rare and endangered throughout its native range but has several strong naturalized populations across Asia. Raucous and social, usually seen in large flocks flying noisily over forested areas. Noticeably smaller than the similarly-colored Sulphur-crested Cockatoo; no natural range overlap, but the two coexist in parts of their introduced range, such as Singapore.
开始您的观鸟之旅
在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。