Riverside Wren
Cantorchilus semibadius
Medium-sized wren with rufous upperparts and bold black-and-white barred underparts. Complex black-and-white face pattern. Sexes alike. Found in pairs or small groups, foraging in the lower levels of forests and shrubby edges.
识别特征
The riverside wren is 13 to 14 cm (5.1 to 5.5 in) long and weighs 17 g (0.60 oz). The adults have a bright orange-brown crown; chestnut nape, back, and rump; and a blackish tail with buff-white bars. They have a black-over-white supercilium and the rest of the face is streaked and spotted black and white. From throat to vent their underparts are pale gray with narrow black bars; the gray becomes somewhat buffy to the rear. Juveniles are duller overall, have fine black scaling on the crown, and the underparts' black bars are not as crisp.
分类信息
The riverside wren has sometimes been treated as conspecific with bay wren (Cantorchilus nigricapillus) but their plumages are quite different as are DNA analyses. The species is monotypic.
- 学名
- Cantorchilus semibadius
- 命名信息
- (Salvin, 1870)
- 目
- Passeriformes
- 科
- Troglodytidae
- 属
- Cantorchilus
分布与栖息地
The riverside wren is found along the Pacific slope from Costa Rica's Gulf of Nicoya into western Panama. It inhabits dense vegetation, preferably along watercourses, swampy edges of woodlands, or on steep precipices. In elevation it ranges from sea level to 1,200 m (3,900 ft).
- 迁徙
- Resident species
行为
The riverside wren forages near the ground, usually in pairs or family groups. It sometimes briefly joins other species at army ant swarms. Its diet includes insects and other invertebrates.<p>The riverside wren appears to nest at almost any time of the year. Its nest is globular made of fine fibers; it drapes over a branch to form two chambers with an entrance hole in the outer one. It is often placed over flowing water, 1.5 to 2.2 m (4.9 to 7.2 ft) above it or the ground. The species also constructs "dormitory" nests for roosting. The clutch size is two.<p>Both sexes of riverside wren sing, repeated "loud ringing phrases" and followed by different phrases, also repeated. Their calls include "harsh churr and various clear tinkling notes".
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Souza's Shrike
Lanius souzae
Small, slim shrike with a brown wing and tail. Note the white slash across the shoulders. Males are gray below and females buffy. Found in broadleaf woodland of miombo, mopane, and Zambezi teak. Uncommon and very localized species. Perches high in trees, but rarely on the conspicuous open perches used by most shrikes. Often in pairs. The vocalizations include an annoyed-sounding “sveeat” and low rasps. Most similar to female Red-backed Shrike, but separated by the white mark across the shoulders and lack of barring on the underparts.
Rusty-margined Flycatcher
Myiozetetes cayanensis
One of several medium-sized, kiskadee-like flycatchers that are bright yellow below, with bold black-and-white head pattern. Rusty-margined is one of the smaller ones, with a smaller bill than Great Kiskadee. Most similar to Social and White-ringed Flycatchers; look for combination of black cheek (not gray) and especially obvious rufous in the wings. Shorter bill than White-ringed. Voice is helpful: listen for lazy-sounding, slightly burry “wheeer” call. Found in a variety of open wooded habitats such as forest edge and second growth, often around water.
Smoky Warbler
Phylloscopus fuligiventer
Dark sooty leaf warbler with a pale brow stripe and no wingbars. Yellow wash to the underparts tends to be absent in worn birds. Extremely similar in appearance to Dusky Warbler, which averages larger and darker overall, and has a longer, brighter brow stripe. Breeds in scrubby areas above the treeline and moves downhill into shrubby and grassy foothill and lowland areas. Forages low on the ground, often around rocks or water. Song is a repetitive series of liquid notes. Calls are dry, hard “chuck” or “tick” notes.
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