Trindade Petrel
Pterodroma arminjoniana
A medium-sized gadfly petrel with long, pointed wings, long tail, and elastic, powerful flight. Bill is short and thick. Upperparts all dark. Has two color morphs—dark and pale. In pale morph, head and breast dark, contrasting with white belly, creating a hooded appearance. Undertail coverts dark. Dark morph is all dark on belly. In both morphs underwing has pale mid-wing panel across the entire wing.
识别特征
The Trindade petrel (Pterodroma arminjoniana), also known as the Round island petrel, is a species of seabird and a member of the gadfly petrels. The bird is 35–39 cm (14–15 in) in size, with an 88–102 cm (35–40 in) wingspan. The petrel has various color morphs: dark and light, as well as intermediates between the two. Previously, two separate populations were considered conspecific, one occurring in the south Pacific, sometimes seen in Hawaii; the other occurring in the south Atlantic, nesting off Brazil, with regular sightings in the Gulf Stream off the southeastern United States. The little-known Pacific birds were then split and determined distinct as the Herald petrel, Pterodroma heraldica. It uses oceanic islands and atolls, nesting on cliff ledges, ridges or rocky slopes. On some islands, nesting birds are threatened by feral cats and rats. Due to ongoing habitat loss and small breeding range, this species is evaluated as vulnerable on the IUCN Red List of Threatened Species. The specific name is after Vittorio Arminjon, captain of the ship during the voyage in which the specimen was collected.
分类信息
Genus: Pterodroma; Family: Procellariidae; Order: Procellariiformes.
- 学名
- Pterodroma arminjoniana
- 命名信息
- (Giglioli & Salvadori, 1869)
- 目
- Procellariiformes
- 科
- Procellariidae
- 属
- Pterodroma
分布与栖息地
Breeding range: AO, IO : Trindade and Martim Vaz Is. (e of c Brazil, tropical sw Atlantic Ocean) and Round I. (ne of Mauritius, c Mascarenes, sw Indian Ocean). Non-breeding range: to e Malagasy waters; e edge of Caribbean islands and temperate w Atlantic Gulf Stream n to Virginia; s to waters of s Brazil.
- 繁殖区
- AO, IO : Trindade and Martim Vaz Is. (e of c Brazil, tropical sw Atlantic Ocean) and Round I. (ne of Mauritius, c Mascarenes, sw Indian Ocean)
- 非繁殖区
- to e Malagasy waters; e edge of Caribbean islands and temperate w Atlantic Gulf Stream n to Virginia; s to waters of s Brazil
- 迁徙
- Complete migrants
行为
Migration pattern: Complete migrants.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
鸟叫声
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