Cave Swiftlet
Collocalia linchi
Typical “white-bellied” swiftlet, endemic to Java, Sumatra, and smaller adjacent islands. Dark above, with a gray-brown breast and white belly. Note squared-off tail and green gloss on the back (only visible in good lighting). Rapid flight is erratic and bat-like. Can generally be seen over a range of habitats from lowlands up into highlands, but restricted to highlands in Sumatra. Extremely similar in appearance to Plume-toed Swiftlet, which has a bluer gloss (though lighting can make this tricky) and feathered hind toes (typically only visible in the hand). Gives a dry, scraping chittering, particularly at roosts.
识别特征
This bird is shiny blackish-brown above with a greenish gloss, including its rump; sometimes looks black and hooded. Chest black; belly to flanks pale grey with fine black speckles at margins. Wing tips are rounded; underwing is black. Tail black, rounded with shallow notch but lacking the white specks found in the very similar glossy swiftlet (Collocalia esculenta). A distinguishing feature between the two species is that the glossy swiftlet has a tuft of feathers on its hind toe but the cave swiftlet has a naked toe. It is 9 to 11.5 cm (3.5 to 4.5 in) in length. The call is a high-pitched "cheer-cheer".
分类信息
The cave swiftlet was described by the naturalists Thomas Horsfield and Frederic Moore in 1854 under the present binomial name Collocalia linchi. The specific epithet linchi is the Javanese word for a swiftlet.<p>There are four recognised subspecies:
- 学名
- Collocalia linchi
- 命名信息
- Horsfield & Moore, F, 1854
- 目
- Apodiformes
- 科
- Apodidae
- 属
- Collocalia
分布与栖息地
The cave swiftlet is native to Malaysia and Indonesia. It is found in the Sundaic region, in Java, Madura Island, Bawean, Kangean Island, Nusa Penida, Bali and Lombok, parts of Sumatra, and the western slopes of Mount Kinabalu on Sabah, Borneo. Evidence of it occurring in Malaysia rests on a single specimen in the British Museum labelled "Molacca". Its natural habitat is lowland and upland forest and open woodland.
- 迁徙
- Resident species
行为
The cave swiftlet is highly gregarious and flies with all the other species of swift that are sympatric with it. It often circles and flies through the branches of trees emerging through the canopy such as fruiting figs. It breeds in the lighter parts of caves, building a nest of stringy vegetation and cementing the materials to the rock with saliva. Two white, somewhat elongated eggs are laid.
保护状况
- 种群趋势
- declining
照片
其他鸟类
Blue-backed Conebill
Conirostrum sitticolor
Small attractive tanager, fairly common and widespread in the temperate zone of the Andes from Venezuela to Bolivia. Black head, blue back, black wings, and burnt-orange belly. Sexes alike. Where it overlaps with Chestnut-bellied Mountain-Tanager note the conebills smaller size and more pointed bill. Typically found in pairs or small family groups working the middle and upper levels of temperate forest and edge. Often follows mixed-species flocks.
Lesser Shortwing
Brachypteryx leucophris
A small ground-hugging bird found in areas with dense cover, usually near moving water. Unlike most shortwings, male and female are not significantly different; both sexes are brown or gray overall, with a white eyebrow and throat. Furtive and quite difficult to see; its tinkling melodic song, which starts with 1-2 slow notes and quickly accelerates into a rushed-sounding loud musical jumble, may give away its position in the undergrowth.
Chestnut-winged Babbler
Cyanoderma erythropterum
A small babbler of tropical lowland and foothill rainforest, including secondary growth. Reddish-brown upperparts with a pale gray face and chest, becoming whitish on the belly. Bare, blue skin around the eye, with vocalizing birds also showing blue skin on the neck. Typically encountered in pairs or small flocks, foraging in the midstory. Brown Fulvetta is somewhat similar but lacks the blue skin around the eye. Song is an ethereal, owl-like series of hooting trills, but also gives noisy rattling and chipping call notes.
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