Scaled Metaltail
Metallura aeneocauda
Small, dark green hummingbird with a short, straight bill. Found at the edges of elfin forest and in humid shrublands above the treeline. Male has an iridescent green throat patch; females lack the throat patch and are duller below, with brownish underparts. Males have a more bronzy, scaled throat and breast and a greener tail than the similar Tyrian Metaltail; female Scaled Metaltails are darker below than that species, without a strong orangey-buff coloration on the throat and breast.
识别特征
The scaled metaltail is 12 to 13 cm (4.7 to 5.1 in) long and weighs 5.2 to 5.4 g (0.18 to 0.19 oz). It has a medium length, straight, black bill. The adult male of the nominate subspecies has bottle green upperparts. Its slightly forked tail is iridescent sky blue with bronzy green tones on its upper side and glittering green on its underside. Its gorget is iridescent bright green. The rest of its underparts are green with a scaly appearance from tan feather margins. The adult female is similar to the male. Its gorget is smaller and its undersides are more mottled. Juveniles are similar to the female. Subspecies M. a. malagae is similar to the nominate but the upper side of its tail is bronzy red and the underside red. It also has a longer bill.
分类信息
The scaled metaltail has two subspecies, the nominate M. a. aeneocauda and M. a. malagae. The latter was for a time treated as a separate species.
- 学名
- Metallura aeneocauda
- 命名信息
- (Gould, 1846)
- 目
- Apodiformes
- 科
- Trochilidae
- 属
- Metallura
分布与栖息地
The nominate subspecies of scaled metaltail is found on the eastern slope of the Andes from the Cordillera Vilcabamba of southeastern Peru south into northwestern Bolivia's La Paz Department. M. a. malagae is found in the vicinity of Inkachaka in central Bolivia's Cochabamba Department. The species inhabits glades and edges of cloudforest and elfin forest and also rocky slopes with herbs and shrubs. In elevation it ranges between 2,500 and 3,600 m (8,200 and 11,800 ft) and is most common above 3,000 m (9,800 ft).
- 迁徙
- Resident species
行为
The scaled metaltail is believed to be sedentary but some dispersal into páramo and lower montane forest is thought possible.<p>The scaled metaltail feeds on nectar from a variety of flowering plants and shrubs, often by clinging to the flower. Males defend feeding territories. In addition to nectar, it feeds extensively on insects.<p>The scaled metaltail's breeding phenology and nest have not been documented. Its breeding season appears to include May and June.<p>The scaled metaltail's chase call is "a descending series of 3–6 squeaky notes, followed by a repeated, buzzy, jumbled phrase, 'trt-tsee-seee-seee-sew..trr-tsee-tsew..trr-tsee-tsew..'."
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
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Chlidonias leucopterus
Buoyant “river tern” with dramatically different breeding and non-breeding plumages. Breeding adult is wildly conspicuous in flight, with contrasting black-and-white plumage; at rest note white shoulders contrasting with black body. Non-breeding and younger birds are white with gray patches and black “earmuffs.” In areas of overlap, juvenile told from Black Tern by dark back contrasting with lighter upperwings and white rump and by black marking above the shoulder. Non-breeding Whiskered Tern can be similar, but has a faded, patchy dark crown instead of earmuffs. Commonly found in flocks around rivers, lakes, and wetlands, where it picks food from surface instead of splash-diving; generally not as closely associated with saltwater as many typical terns.
Gray-crowned Flatbill
Tolmomyias poliocephalus
Small, stocky flycatcher with broad, flat bill. Occupies canopy and midstory of forest edges, gardens, and tall second growth in humid lowlands. Has gray crown, pale yellow underparts, and yellow edgings to wing feathers (but not wingbars). Very similar to a few other species of flycatchers, particularly Yellow-margined and Yellow-olive Flycatchers; best distinguishing features include its pale eye, lack of a yellow patch at the base of the primaries, and voice. Call is a loud, quickly rising whistle: “tuee?”, higher and cleaner than similar calls from species like Brownish Twistwing and Blue-backed Manakin, but not as high as the “twee-twee” of Purple-throated Euphonia.
Golden Tanager
Tangara arthus
Small tanager found in Andean foothills and subtropical zone from Venezuela to Bolivia. Mostly bright golden-yellow with isolated black ear patch, streaked back, and mostly black wings and tail. Some variation among populations, with northernmost birds showing a chestnut breast band and flanks. Sexes alike; young birds duller yellow. One of the most common tanagers in mixed flocks from around 900–2,200 m, in cloud forest, edges, and gardens.
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