Tenggara Swiftlet
Collocalia sumbawae
A tiny swift with dark plumage except for the off-white underside from the lower breast down. Tail looks square, only sometimes showing a very marginal tail notch. Aerial and gregarious, gathering in flocks over a variety of habitats, both open and forested. Restricted to the western Lesser Sundas, where it only overlaps with one other similar species, White-nest Swiftlet. Tenggara Swiflet is smaller with a white underside, unlike that species.
识别特征
The Tenggara swiftlet is 9–10 cm (3.5–3.9 in) in length with a square tail. The back and upper surface of the wings are dark blue with a moderate gloss. The rump is generally dark but sometimes includes feathers with thin white edging. The throat and upper breast are grey with fine white scalloping merging into larger greyish chevrons over the lower breast and flanks, becoming white over the belly. There is occasionally a tuft of small feathers on the hallux, the rear facing toe. This species lacks the white spots on the inner webs of the tail feathers that are present in some Collocalia species.
分类信息
The Tenggara swiftlet was described by the German ornithologist Erwin Stresemann in 1925 under the present binomial name Collocalia sumbawae. The type locality is the island of Sumbawa in the Lesser Sunda Islands. The Tenggara swiftlet was formerly treated as a subspecies of the glossy swiftlet but was promoted to species status based on the results of a detailed analysis of the swiftlets in the genus Collocalia published in 2017.<p>There are two subspecies:
- 学名
- Collocalia sumbawae
- 命名信息
- Stresemann, 1925
- 目
- Apodiformes
- 科
- Apodidae
- 属
- Collocalia
照片
鸟叫声
其他鸟类
Ruddy Turnstone
Arenaria interpres
Fairly small, stocky shorebird with short, chisel-like bill. Breeding plumage is particular striking with bright rusty upperparts and bold black-and-white pattern on head and neck. Nonbreeding and juvenile are duller brown but still boldly patterned; note orange legs. Interesting behavior of flipping over rocks, shells, and other debris to nab invertebrates. Fairly common, with extensive global range. Breeds in the high Arctic tundra; winters on coastlines nearly worldwide. Prefers rocky habitats, but also seen on beaches and mudflats. Usually in small flocks, often mixed with other shorebirds. Listen for low, hard rattle call.
Flammulated Treehunter
Thripadectes flammulatus
Uncommon medium-sized brownish bird of Andean montane forest from Venezuela through Ecuador and just barely into Peru. Distinctive among treehunters with its bold buffy streaking covering the entire head, back, and body. Rufous wings and tail. Sexes alike. Usually found singly or in pairs moving furtively through the understory of forest, often around bamboo, from around 2,200–3,500 m. Does not typically follow mixed-species flocks.
White-throated Needletail
Hirundapus caudacutus
A powerful-looking swift with long saber-shaped wings and a bullet-shaped body. The only swift in its range that combines a clean white throat and smooth pale gray back. At close range, the fine white forehead and bluish tinge to the back are also visible. Flies higher than most other swifts during migration, often circling over mountaintops and valleys with kettles of migrating birds of prey. Less erratic and bat-like in flight than other swifts. Call is a high-pitched, screaming twitter.
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