Family Petrels, Shearwaters (Procellariidae)

Vulnerable

Stejneger's Petrel (Pterodroma longirostris)


Taxonomy

French: Pétrel de Stejneger German: Stejnegersturmvogel Spanish: Petrel de Más Afuera
Taxonomy:

Aestrelata longirostris

Stejneger

, 1893,

Province of Mutzu, Hondo, Japan

.

Forms part of assemblage referred to as subgenus Cookilaria. Formerly included P. pycrofti as a subspecies. May be closely related also to P. leucoptera and perhaps also P. hypoleuca. Proposed form masafuerae is a synonym of longirostris. Monotypic.

Distribution:

NC Pacific Ocean, breeding on Alejandro Selkirk I (formerly Más Afuera I), in Juan Fernández Is, off C Chile.

Descriptive notes

26–31·5 cm; 114–167 g; wingspan 70–76 cm. Small grey-and-white gadfly petrel with bold black-and-white pattern on underwing. Feathers of forehead... read more

Voice

Considered similar to that of P. macroptera, a rapid “ti-ti-ti”.

Habitat

Marine and highly pelagic. Breeds on oceanic islands, occupying slopes and ridges at 850–1100... read more

Food and feeding

Feeds primarily on squid and small fish; sea skaters (Halobates sp.) also recorded in diet, although these (and other insects)... read more

Breeding

Starts Nov, with egg-laying probably between late Dec and early Jan, and hatching in late Jan/early Feb. Nocturnal at breeding sites.... read more

Movements

Transequatorial migrant, occurring in subtropical waters off Japan, Jun–Nov (mainly May... read more

Status and conservation

VULNERABLE. Total population was estimated at 131,000 breeding pairs and perhaps 400,000 individuals in 1986, but more recent information suggests that current numbers are... read more

Recommended citation

Carboneras, C., Jutglar, F. & Kirwan, G.M. (2018). Stejneger's Petrel (Pterodroma longirostris). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/52547 on 19 January 2018).