Mountain Swiftlet
Aerodramus hirundinaceus
A common, mid-sized swiftlet found over forests and open areas, mainly in the mountains. Slender shape and a notched tail that it sometimes fans. Gray-brown with a contrasting darker tail and forewing. Often seen in flocks and can fly at all levels. Does long glides with tips of the wings held down slightly, and sometimes tipping from side to side. Not safely distinguished from the lowland Uniform Swiftlet. Call, a high-pitch, up-and-down chatter including some grating notes.
识别特征
The mountain swiftlet (Aerodramus hirundinaceus) is a species of swift in the family Apodidae. It is endemic to the island of New Guinea and the nearby islands of Karkar, Yapen and Goodenough. It was once placed in the genus Collocalia but has been moved, with many others, to Aerodramus. The species is divided into three subspecies, with the nominate, A. h. hirundinacea ranging over most of New Guinea, the subspecies A. h. excelsus occurring over 1600 m in the Snow Mountains and Cartenz peaks of Irian Jaya and A. h. baru being restricted to Yapen Island. It occurs in alpine areas from 500 m to the treeline. Its natural habitat is tropical moist montane forests and other mountainous habitats in New Guinea. It also occurs in lower numbers in the lowlands near hills. The mountain swiftlet is a medium-sized swiftlet, 11–13 cm long. It has dark brown upperparts and paler grey undersides. The tail is slightly forked. The subspecies vary slightly from the nominate race, A. h. baru has browner underparts and darker upperparts, while A. h. excelsus is larger than the nominate race. Like other members of the genus this species is able to echolocate, a trait it uses to navigate itself in the caves it breeds in. Like the rest of its genus it breeds in caves, constructing nests of vegetation such as ferns, rootlets and grasses, or lichens, held together with saliva. They are colonial, but the caves examined so far do not suggest that they nest densely. The peak of the breeding season is October through December, but there are occupied nests through most of the year. The clutch size is a single egg for this species. The nestling period, between 57 and 74 days, is one of the longer chick raising periods of any swifts. This is counteracted by a comparatively high breeding success rate, with 61% of mountain swiftlets successfully raising chicks.
分类信息
Genus: Aerodramus; Family: Apodidae; Order: Apodiformes.
- 学名
- Aerodramus hirundinaceus
- 命名信息
- (Stresemann, 1914)
- 目
- Apodiformes
- 科
- Apodidae
- 属
- Aerodramus
分布与栖息地
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
其他鸟类
Whiskered Yuhina
Yuhina flavicollis
Distinguished-looking small songbird with a brown mohawk of a crest. Brown above and white below with an orange nape and a small black mustache stripe. Slender white eye crescents give it a “spectacled” appearance on top of a whiskered one. Like other yuhinas, a very social bird, often seen foraging in the lower and middle levels of hilly broadleaf forests, sometimes with other species. Calls are usually an explosive pair or triad of notes that can be likened to “pee-bee!” or “pee-ah-bee!”
Blakiston's Fish-Owl
Ketupa blakistoni
Massive pale brown owl with plump, rounded ear tufts. An endangered species, found in mature boreal forests near streams where there are tree cavities suitable for nesting. Preys mostly on fish. Distinguished from Eurasian Eagle-Owl by absence of broad black streaks on breast and rounder, thicker ear tufts that are not held erect. Deep, resonant song, given in duet by pair. Duet consists of three notes, with the first two notes from a male and a third from a female. The lower-pitched female note partially overlaps with the second male note.
Little Weaver
Ploceus luteolus
Minuscule yellow weaver. Breeding males have a clean black face mask and pure lemon underparts. Females and non-breeding males have a streaked back and pale face and underparts. Found in savanna and sometimes cultivated areas. Usually in pairs or small groups; not as social as some weavers. Vocalizations are typical of weavers: “chet” notes and a sizzling, “radio static” song. Most similar to Slender-billed Weaver, but found in different habitat, and has a much stubbier bill. Separated from all other weavers by its small size.
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。