Plume-toed Swiftlet
Collocalia affinis
The iridescent blue back is the best way to distinguish this species from other swiftlets within its range, but this feature is typically only visible when the bird is flying low (often over water) or on the nest. Relatively well-demarcated white belly and dark rump also serve to distinguish this species from Aerodramus swiftlets. Common and well-adapted to human habitation, nesting socially in both caves and manmade structures. Flies in flocks over forests, fields, and water bodies. Gives sharp grating twitters at the nest, but generally quiet.
识别特征
The plume-toed 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 uniformly dark greenish-blue with a moderate gloss. The throat and upper breast are dark grey merging into large greyish chevrons over the lower breast and flanks, usually becoming white over the belly. There is a tuft of small feathers on the hallux, the rear facing toe. This species lacks a pale contrasting rump and has no white spots on the inner webs of the tail feathers.
分类信息
The plume-toed swiftlet was described by the English ornithologist Robert Cecil Beavan in 1867 and given current binomial name Collocalia affinis. The type locality is Port Blair in the Andaman Islands. The specific epithet affinis is Latin for "related" or "applied". The plume-toed swiftlet was previously 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 five subspecies:
- 学名
- Collocalia affinis
- 命名信息
- Beavan, 1867
- 目
- Apodiformes
- 科
- Apodidae
- 属
- Collocalia
照片
鸟叫声
其他鸟类
Caspian Tit
Poecile hyrcanus
Small plain tit. Note diagnostic brown cap, raggedly-demarcated bib, and richly-colored dark brown upperparts. Very similar to closely-related Sombre Tit, but ranges do not overlap. Restricted to the Talysh and Elburz Mountains of the southern Caspian coast, where it inhabits mixed forests. Gives various nasal and chipping calls; repetitive simple song rarely heard.
Thick-billed Vireo
Vireo crassirostris
A small loquacious inhabitant of scrubland, thickets, and brushy forest edges where it typically feeds within dense cover. The similar White-eyed Vireo can be distinguished by its smaller bill, greener back, and bright yellow sides; furthermore, adults have white, not dusky, eyes. The Cuban Vireo lacks the Thick-billed Vireo’s bold wingbars. The song is a scratchy jumbled “chick, didderwid-weee-zhee, chip” or variations thereof. Calls include a “zhip” given singly or in short bursts, a drawn-out harsh “zzhhe,” and a variety of chattering sounds.
Sakalava Weaver
Ploceus sakalava
Chunky, big-billed weaver of dry country. Yellow-hooded breeding male is distinctive. Both sexes have pink bare skin around the eye. Madagascar endemic that is found in the north and west at low and middle elevation. Preferred habitats include open forest, scrub, plantations, savannah, and villages. Very social weaver that is almost always found in flocks, sometimes mixed with other birds, and which nests in bustling colonies. The nest is a messy hanging orb. Song is a complex, high-pitched series of scolding and sizzling notes. Call is a husky “chert.” Female and non-breeding male similar to fodies, but separated by larger size, bigger bill, pink facial skin, and different facial pattern.
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