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White-necked petrel
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The white-necked petrel (''Pterodroma cervicalis''), also known as the white-naped petrel, is a species of seabird in the family Procellariidae. During the non-breeding season it occurs throughout a large part of the Pacific, but it is only known to breed on Macauley Island in New Zealand's Kermadec Islands and the Australian territory of Norfolk Island and Phillip Island. It formerly bred on Raoul Island, but has now been extirpated from this locality. Reports of breeding on Merelava, Vanuatu, are more likely to be the very similar Vanuatu petrel, ''P. occulta'', which some consider to be a subspecies of the white-necked petrel. The IUCN rating as vulnerable is for the "combined" species.
==Description==
This species resembles the Vanuatu petrel, ''P. occulta'', but is slightly larger at in length, in wing span and in weight. It has a black cap, white rear neck, dark grey back, wings and tail, and a darker rump. The underparts are white with dark bases on the primary feathers. The upperparts of worn birds become darker.
It is very difficult to separate the white-necked petrel from the Vanuatu petrel at sea.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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