Monotypic
 

Identification

Differs from other diving petrels in having a conspicuous crescent-shaped half collar on the side of the neck. In the hand, the bill is not as long or elongated as Peruvian Diving-Petrel.
 

Where and When

Restricted to coasts of southern Chile and southern Argentina. Maybe also breeds on Isla Grande and other islands off Tierra del Fuego. Movements of non-breeding birds poorly known. Certainly remains in breeding range all year.
 

Photographs on the web

In flight Photo by Martin Reid and on his excellent site.
 

Literature