Gray-barred Wren
Campylorhynchus megalopterus
Large, noisy wren of pine-oak and conifer forests in mountains of south-central Mexico; endemic. Usually found in groups, foraging low in brushy tangles or high in tall trees. Clambers along branches and pokes into bromeliads, often in mixed-species feeding flocks with orioles and woodcreepers. Plumage is distinctive, with boldly spotted breast and boldly banded back, wings, and tail. Juveniles (seen in summer) are very different, with streaked buffy back and plain whitish breast.
识别特征
The gray-barred wren is 17 to 19.5 cm (6.7 to 7.7 in) long and weighs 32.8 to 33.5 g (1.16 to 1.18 oz). Both sexes of the nominate have a grayish crown with a black center, a black and white striped nape, and black shoulders and back barred with white. Their throat and chest are white with black spots and the flanks buff with blackish bars. C. m. nelsoni is the smaller of the subspecies and its underparts' spots and bars are grayish brown. The juvenile has a solid brown cap and is buff and brownish overall with no bars on the back and no spots on the chest.
分类信息
The gray-barred wren has two subspecies, the nominate Campylorhynchus megalopterus megalopterus and C. m. nelsoni. The latter has been suggested as a separate species but there are only small differences between the subspecies in size and plumage and no apparent differences in their voices.
- 学名
- Campylorhynchus megalopterus
- 命名信息
- Lafresnaye, 1845
- 目
- Passeriformes
- 科
- Troglodytidae
- 属
- Campylorhynchus
分布与栖息地
The ranges of the two subspecies of gray-barred wren do not meet. The nominate is found in the Trans-Mexican Volcanic Belt from Jalisco and Michoacán east to western Puebla. C. m. nelsoni is found in the southern Sierra Madre Oriental from west-central Veracruz through eastern Puebla into northern Oaxaca. It inhabits several types of montane forest including humid pine-oak and stands of Abies fir. It occurs in both primary and secondary forest. In elevation it ranges between 2,100 and 3,150 m (6,890 and 10,330 ft).
- 迁徙
- Resident species
行为
Though the gray-barred wren's diet has not been documented, it is probably small invertebrates. It does not forage on the ground but probes epiphytes, mosses, and lichens.<p>The gray-barred wren's breeding season appears to be May to June. Its nest is a domed structure with a side entrance constructed of moss and placed high in a tree. Little else is known about the species' breeding phenology.<p>The gray-barred wren's song is "a rapid harsh chatter" [1]; both sexes sing in duet. Its call is "a harsh 'karrr'" [2].
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Silver Oriole
Oriolus mellianus
Male’s bone-white back and belly are unlike that of any other oriole. Female has the same black head and wings but has a gray-brown back and a densely streaked belly. Both sexes have reddish tails. Shape and color scheme are similar to Maroon Oriole (minimal range overlap), which is much darker and browner overall. Forages in the canopy and sometimes perches out on exposed snags and treetops. Uncommon and localized in lowland and foothill moist forests. Song is a musical, flute-like series of whistles. Gives cat-like mewing calls.
Pallid Dove
Leptotila pallida
A rather plain medium-sized dove, mostly restricted to western Ecuador but also occurs in western Colombia and extreme northwestern Peru. Within range, the main confusion species is White-tipped Dove. Pallid Dove has notably darker and warmer brown upperparts that contrast more with the whitish underparts. Like other members of the genus, Pallid is typically found on the ground (or flushing up into the understory). It is most often seen walking on roads or trails, or flying across quickly. There are a few places where it visits feeders. Within its limited range, it is fairly common, but be careful to separate from the equally (or more) common White-tipped Dove. Listen for its low-pitched, single “hoo” call.
Medium Tree-Finch
Camarhynchus pauper
A critically endangered Galápagos finch found only on the island of Floreana. Bill is moderately curved on both upper and lower edges, and slightly longer than it is deep. Male has a black hood, brownish-olive upperparts, and a pale belly. Female is tan with whitish underparts. Both sexes have faint streaking on the breast. Bill is black on breeding male and orange on female and non-breeding male. Large Tree-Finch has larger and more bulbous bill. Small Tree-Finch has slightly smaller bill and body. Identification is much easier when more than one species is present to allow direct comparison. Medium Tree-Finch inhabits forest mainly in the highlands but is occasionally seen closer to the coast, where it may be only a seasonal visitor.
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