Juan Fernandez Petrel
Pterodroma externa
Isla Robinson Crusoe,
Chile
11 Feb 2000

The following from Wikipedia. The Juan Fernández Petrel (Pterodroma externa) is a species of seabird in the Procellariidae family.

The Juan Fernández Petrel breeds only on one island in Chile, Isla Alejandro Selkirk. The breeding population was estimated at 1,000,000 pairs in 1985–86, and there may be up to 3–5 million birds globally. It is threatened by predation from introduced species (cats and rats) and, to a lesser extent, habitat loss from introduced herbivores (goats). The IUCN Red List lists this species as Vulnerable due to its endemic status and threats from introduced predators.

The Juan Fernández Petrel is a large species of gadfly petrel, 43 cm (17 in) long with a wingspan of 95–97 cm (37–38 in) and a mass of 500 g (1.1 lb). The upperparts are dark brownish-grey and there is a black M-shaped marking across the extended wings. The underparts are white, with the underside of the wing edged is black. The face is white, with a black "cap" extending to below the eyes. The bill is black with a hooked tip and houses the tubular nostrils that are unique to Procellariiformes.