Chatham Islands Petrel
Pterodroma axillaris
Gadfly petrel of medium size. Dark gray upperparts and white below with a diagonal black bar from the edge of the wing to the black base of the underwing. Has a black bill, a dark eye-patch, and pink legs and feet. Breeds only on the Chatham Islands, but can forage up 3000 km offshore. Migrates to deep waters off the South American coast. Distinguished from Black-winged Petrel by the reduced black bar on the underwing; Mottled Petrel is similar but larger, with a dark belly, lacking the diagonal bar on the wing.
识别特征
The Chatham petrel is a medium-sized petrel with a mottled dark-grey and white forehead, dark grey back and upper wings, and white underparts. A black diagonal bar extends from the leading edge of underwing to a black ‘armpit’. The shoulders and upper-wing coverts are a deeper grey giving a dark M pattern across the spread upper wings. <p>The bill is black and strongly hooked tip. The eye is dark, and the legs and feet are pink, with dark outer toes and webs. The sexes are alike. <p>Chatham petrels are rarely observed away from the colony; the few at-sea records are from ships in oceanic waters.
分类信息
- 学名
- Pterodroma axillaris
- 命名信息
- (Salvin, 1893)
- 目
- Procellariiformes
- 科
- Procellariidae
- 属
- Pterodroma
分布与栖息地
This species breeds only in the Chatham Islands.
- 繁殖区
- PO : South East I. (=Rangatira, Chatham Is., e of South I., New Zealand)
- 非繁殖区
- to Nazca Ridge w of Peru and Chile (c South Pacific Ocean)
- 迁徙
- Complete migrants
保护状况
- 种群趋势
- rising
照片
分布
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