Family Petrels, Shearwaters (Procellariidae)

Vulnerable

Juan Fernandez Petrel (Pterodroma externa)


Taxonomy

French: Pétrel de Juan Fernandez German: Salvinsturmvogel Spanish: Petrel de las Juan Fernández
Taxonomy:

Oestrelata externa

Salvin

, 1875,

Más Afuera Island, Chile

.

Often includes P. cervicalis. Has been considered a subspecies of P. hasitata. Monotypic.

Distribution:

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

Descriptive notes

42·5–45 cm; 310–555 g; wingspan 95–114 cm. Large grey-and-white, long-billed and dark-capped gadfly petrel with mostly clean white underwing.... read more

Voice

Vocal only at colonies, in flight giving prolonged sighing whistles, especially during male/female... read more

Habitat

Marine and highly pelagic, rarely approaching land except at colonies. Breeds on high ground at 600... read more

Food and feeding

Probably takes mostly ommastrephid squid and flying-fish, but also recorded taking Vinciguerria (Gonostomatidae, bristlemouths) and sea... read more

Breeding

Poorly known. Starts Oct/Nov on return to colony, with egg-laying probably between 20 Dec and 10 Jan (based on single season) and fledging... read more

Movements

Mainly found around breeding islands (34º S) while nesting, although some penetrate as far S... read more

Status and conservation

VULNERABLE. Total population was estimated to number > 1,000,000 pairs and 3,000,000 birds in 1986, with no firm evidence of decline since then. Fossil material pertaining... read more

Recommended citation

Carboneras, C., Jutglar, F. & Kirwan, G.M. (2018). Juan Fernandez Petrel (Pterodroma externa). 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/52539 on 26 April 2018).