Long-billed Murrelet
Brachyramphus perdix
Small, chunky seabird of the northwestern Pacific, usually seen at sea, sometimes near land. Breeding adult is chocolate brown with scaled brown-and-white underparts. Wintering adult is gray above and white below with thin white “spectacles” and patchy white splotches on the sides and back. Nonbreeding Spectacled Guillemot perhaps similar but is significantly larger, with much neater black-and-white plumage (and more extensive white on neck), more prominent forehead, and much longer bill.
识别特征
The long-billed murrelet is a small (25 cm long), chunky auk with a slender black bill. It has pointed wings and plumage that varies by season. The non-breeding appearance is typically white underneath with a black crown, nape, wings and back. The breeding plumage is mainly brown, with pale feather edges giving a scaly appearance; the central underparts, normally below the surface on a swimming bird, are white.<p>The long-billed murrelet is longer billed, slightly larger, and 20% heavier than the marbled murrelet, and has a white eye ring. In breeding plumage it shows a pale throat which is absent in marbled murrelet, and weaker scaling because of fewer rusty and buff markings. In winter, the long-billed murrelet lacks the white collar of the marbled.<p>Measurements:
分类信息
Genus: Brachyramphus; Family: Alcidae; Order: Charadriiformes.
- 学名
- Brachyramphus perdix
- 命名信息
- (Pallas, 1811)
- 目
- Charadriiformes
- 科
- Alcidae
- 属
- Brachyramphus
分布与栖息地
Breeding range: PAL : coastal strip of temperate w North Pacific: Kamchatka, Sea of Okhotsk, Sakhalin (e Russia) and n Hokkaido (n Japan); nests up to 30 km inland. Non-breeding range: to coastal c Japan; prone to long-distance vagrancy to continental USA.
- 繁殖区
- PAL : coastal strip of temperate w North Pacific: Kamchatka, Sea of Okhotsk, Sakhalin (e Russia) and n Hokkaido (n Japan); nests up to 30 km inland
- 非繁殖区
- to coastal c Japan; prone to long-distance vagrancy to continental USA
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: declining.
- 种群趋势
- declining
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