Tawny-flanked Prinia
Prinia subflava
A slender, active unstreaked warbler with a long graduated tail that is sometimes cocked. It is mouse-brown above and pale below, with tawny flanks and a distinctive pale eyebrow. Pairs and small groups patrol rank grass, riverine scrub, and thickets in savanna, where they are often on the ground or in the lower levels of vegetation. The species sings a strident “stiiikk” note repeatedly 6-15 times before pausing, but it may sing incessantly for minutes, and it also has a tinnier “stip-stip-stip” call; tone and pitch vary geographically. The similar Pale Prinia is more washed out with whitish flanks, and the very similar-looking River Prinia is local, restricted to riverine fringes in the Sahel, and has a sweeter higher-pitched song.
识别特征
The tawny-flanked prinia is 11–12 cm (4.3–4.7 in) in length with a long, narrow, graduated tail and a fairly long, slender bill. The tail is often held erect or waved from side to side. The upperparts are grey-brown with rufous-brown edges to the flight feathers and a rufous tinge to the rump. The throat and breast are whitish while the flanks and vent are warm buff. There is a whitish stripe over the eye and the lores are dark. The tail feathers have a white tip and a dark subterminal band.<p>The sexes are similar in appearance. Non-breeding birds have a longer tail than breeding birds. Juveniles have pale yellow underparts and a yellowish bill. There are many recognised subspecies.<p>The call is short, wheezy and rapidly repeated. The song is a monotonous series of shrill notes. The male often sings from an exposed perch.<p>The pale prinia (P. somalica) of North-east Africa is similar but paler and greyer with whitish flanks. It inhabits drier, more open habitats than the tawny-flanked prinia. The river prinia (P. fluviatilis) of West Africa is also paler and greyer and has a longer tail. It is restricted to waterside vegetation.
分类信息
The tawny-flanked prinia was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it with the wagtails in the genus Motacilla and coined the binomial name Motacilla subflava. The specific epithet combines the Latin sub meaning "beneath" or "somewhat" with flavus meaning "yellow". Gmelin based his account on a hand coloured engraving by François-Nicolas Martinet that was published to accompany the Comte de Buffon's multi-volume work, the Histoire Naturelle des Oiseaux. The tawny-flanked prinia is now one of 30 species placed in the genus Prinia that was introduced by the American naturalist Thomas Horsfield in 1821.<p>Ten subspecies are recognised:
- 学名
- Prinia subflava
- 命名信息
- (Gmelin, JF, 1789)
- 目
- Passeriformes
- 科
- Cisticolidae
- 属
- Prinia
分布与栖息地
There are ten subspecies distributed across most parts of sub-Saharan Africa except for the driest and wettest areas. It is absent from much of the Congo Basin, southern Namibia, south-west Botswana and the western half of South Africa. It is found amongst shrubs and grass in a variety of habitats including woodland, savanna and cultivated areas. It adapts well to man-made habitats and is not considered to be threatened.
- 迁徙
- Resident species
行为
It feeds on insects and other invertebrates. It forages in small flocks which move through shrubs and undergrowth.<p>The nest is purse-shaped and made of strips of grass woven together. It is built one to two metres above the ground. Two to four eggs are laid; they are variable in ground colour and usually have brown or purple spots or blotches.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Orange-crowned Euphonia
Euphonia saturata
Small finchlike bird, compact and short tailed with a stout bill. Male has notably orange-tinged underparts and dark upperparts with a purplish sheen. The orange-yellow crown is extensive (not restricted to the forehead like many other euphonias). Also note the underside of the tail, which is entirely dark. Females are plain yellowish-olive overall and difficult to separate from other euphonias, especially Thick-billed, but usually seen in pairs or small groups with males. Frequents woodlands, edges, and clearings in lowlands and foothills, often in fairly dry regions. Can be found in mixed-feeding flocks with other species such as warblers and tanagers.
Nocturnal Curassow
Nothocrax urumutum
This small curassow is entirely warm brown with a bright orange bill, yellow skin above the eye, and gray skin below the eye. True to its name, it is strictly nocturnal and thus extremely difficult to see. It is much more often detected by voice: listen for a low, booming song typically with three notes. With a great deal of effort and luck, a singing individual might be spotted perched in the canopy. Occurs in lowland forest in western Amazonia, where it typically stays in the upper levels, rarely dropping to the ground.
Boreal Owl
Aegolius funereus
Small, chunky owl with a large, flat-topped head. Note extensive white spotting and gray face framed in black. Inhabits boreal, highland, and mixed woodlands; nests in tree cavities. Can be very difficult to find by day. At night, listen for fast tooting song, which can be confused with a displaying snipe; note clearer whistled tone and steadier volume. Populations move in response to winter conditions and prey populations, with large numbers moving south of typical wintering range some winters. Sometimes hunts small rodents around bird feeders. In Eurasia, compare with Eurasian Pygmy-Owl, which is smaller, has a less distinct facial disc, and finer spotting. In North America, distinguished from Northern Saw-whet Owl by its colder gray-brown coloration and spotted (not streaked) forehead.
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