Little Shearwater
Puffinus assimilis
A small, pale-faced shearwater with the separation line between black and white on the face passing through or above the eye. Mainly sedentary and relatively shy, feeding farther offshore than similar seabirds. Winter breeding birds mainly found around the Kermadec Islands, off southwest Australia, and off the northeastern coast of the North Island of New Zealand. The Fluttering Shearwater can be distinguished by its larger size, smudgy brown underwing, dark face, and tendency to congregate in flocks much closer to shore.
识别特征
This shearwater has the typically "shearing" flight of the genus, dipping from side to side on stiff wings with few beats, the wingtips almost touching the water, though in light winds it has a more flapping flight than that of its larger relatives. In flight it looks cross-shaped, with its wings held at right angles to the body, its colouration changing from black to white as the black upperparts and white underparts are alternately exposed as it travels low over the sea.<p>At 25–30 cm (9.8–11.8 in) in length with a 58–67 cm (23–26 in) wingspan, it is like a small Manx shearwater but has proportionally shorter and broader wings, with a pale area on the inner flight feathers. Its bill is more slender than that of Manx, and its dark eye stands out against the surrounding white area.
分类信息
mtDNA cytochrome b sequence data indicate that the former North Atlantic little shearwater group (Boyd's shearwater, P. boydi and Barolo shearwater, P. baroli) is closer to Audubon's shearwater (Austin 1996, Heidrich et al. 1998), (although many taxonomists now consider them to be distinct species), and Rapa shearwater (P. myrtae), being closer to the Newell's and possibly Townsend's shearwater (Austin et al. 2004). Heinroth's shearwater was also sometimes considered a subspecies of this bird; the relationship between the little and Audubon's shearwater is probably not as close as long believed (Austin 1996, Heidrich et al. 1998, Austin et al. 2001, but see also Penhallurick & Wink 2004, and Rheindt & Austin 2005). The subantarctic shearwater was also considered conspecific (Onley & Scofield 2007, Gill et al. 2010)
- 学名
- Puffinus assimilis
- 命名信息
- Gould, 1838
- 目
- Procellariiformes
- 科
- Procellariidae
- 属
- Puffinus
分布与栖息地
It breeds in colonies on islands and coastal cliffs, nesting in burrows which are only visited at night to avoid predation by large gulls.
- 迁徙
- Complete migrants
行为
Migration pattern: Complete migrants.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
其他鸟类
Little Green Sunbird
Anthreptes seimundi
Tiny, drab warbler-like sunbird. The bill is slightly curved and partially pink. Also note the pale eye-ring. Found in the canopy and mid-story of humid forest at low and middle elevations, usually in pairs or small groups. The most common call is a simple, high-pitched “tseeet”. Very similar to Bates’s Sunbird, but has a less curved bill and a more distinct eye-ring. Distinguished from females of other species of sunbirds by the pink on the bill and the green rather than blackish tail.
Delicate Prinia
Prinia lepida
Tiny, disproportionately long-tailed, active, and vocal. The upperparts are gray-brown with heavy dark streaking, the underparts are pale, and each tail feather shows both pale and dark tips. Generally found in rather moist habitats within arid zones, including field margins, riparian woodland, scrub, gardens, and wetlands; can be quite numerous. Very vocal, especially in spring. The song is a rattling series of dry chirps, subtly different from the slower-paced song of Graceful Prinia. Males often sing from obvious perches. Visually extremely similar to Graceful Prinia, but there is little overlap in range. In any areas of overlap, best separated by song, but Delicate is also slightly longer- and narrower-tailed and browner.
Black-browed Barbet
Psilopogon oorti
Loud but sluggish and difficult-to-see canopy inhabitant of highland forests in peninsular Malaysia and Sumatra. Note the leaf-green body, brightly colored face, and heavy black bill. More often heard than seen; listen for its long, unending series of hollow-sounding notes. Like many other barbets, it can be difficult to locate when singing, but can sometimes be seen at fruiting trees. Formerly regarded as the same species as Taiwan, Indochinese, and Chinese Barbets.
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