Large, heavy-bodied seabird with a long daggerlike bill. Adults have distinctive blue feet. Note dark bill.© Darren Clark | Macaulay LibraryGalápagos, September 01, 2014
Large, heavy-bodied seabird with a long daggerlike bill. Immatures are dark overall with variable amounts of white mottling on the back. Note paler head and white belly.© Ian Davies | Macaulay LibraryOaxaca, January 09, 2013
The underwings on immatures are mostly dark. Note pale head and white belly.© Ian Davies | Macaulay LibraryEl Callao, January 20, 2010
Large, heavy-bodied seabird with long pointy wings. In flight, note mostly dark underwings on immature birds.© Steve Collins | Macaulay LibraryNew Mexico, August 23, 2009
Nests on the ground on islands. Forages at sea.© Michael Warner | Macaulay LibraryGalápagos, February 27, 2015
Immatures are mostly brown with a dark bill and a white belly. Often roosts on rocky islands.© Ryan O'Donnell | Macaulay LibraryBaja California, October 04, 2008
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