Mascarene Petrel
Pseudobulweria aterrima
An entirely dark petrel that usually has a cross-like shape in flight. Note the large, square head, the thick bill, and the long rear. Critically endangered; nests on cliffs and crevices on the island of Reunion and feeds in the surrounding ocean. The vocalization is an eerie scream, given at night around breeding sites. Separation from several similar species is tricky. Most similar to Great-winged Petrel, and distinguished only by subtle differences, including the heavier head and bill, longer neck and tail, more rounded wing, and less explosive flight. Also similar to Jouanin’s Petrel, but identified by larger size, longer wings that are held straighter, and shorter rear. Separated from Wedge-tailed Shearwater by the much heavier bill, and from dark-morph Trindade Petrel by the lack of a silver flash in the underwing.
识别特征
The Mascarene petrel (Pseudobulweria aterrima) is a medium-sized, dark petrel. Also sometimes known as the Mascarene black petrel, this species was known from four specimens found in the nineteenth century on the island of Réunion. Two birds were found dead in the 1970s, and there have been rare observations of birds in the waters south of Réunion since 1964. It is also known from subfossil remains from the island of Rodrigues. It is known to breed in very small numbers in the Grand Bassin – Le Dimitile Important Bird Area in the mountains of Réunion. Masacarene petrels are primarily monogamous. The species is classified as critically endangered as it is inferred from the number of records that there is an extremely small population threatened by introduced species, such as feral cats and house rats, and light pollution. Despite these threats, genetic diversity of the species is high. Public awareness campaigns resulted in the finding of 58 Mascarene petrels between 1996 and 2021. Réunion scientists reported this as part of their work to locate breeding colonies using acoustic surveys. They note that the population is declining due to predation and, by locating the colonies, conservation measures could be implemented.
分类信息
Genus: Pseudobulweria; Family: Procellariidae; Order: Procellariiformes.
- 学名
- Pseudobulweria aterrima
- 命名信息
- (Bonaparte, 1857)
- 目
- Procellariiformes
- 科
- Procellariidae
- 属
- Pseudobulweria
分布与栖息地
Breeding range: IO : montane Réunion (w Mascarenes; formerly also Rodrigues). Non-breeding range: to Seychelles, Arabian Sea, Bay of Bengal and Timor Sea (n of w Australia).
- 繁殖区
- IO : montane Réunion (w Mascarenes; formerly also Rodrigues)
- 非繁殖区
- to Seychelles, Arabian Sea, Bay of Bengal and Timor Sea (n of w Australia)
- 迁徙
- unknown
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
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