Length: 18 in Wingspan: 3-4 feet Weight: 1-2 lbs
Neat dark cap and short collar. Underside mostly white, with variable smudging on belly.
Nest primarily on Tristan Islands in the south Atlantic. During the nonbreeeding season (summer in the Northern Hemisphere), birds spread throughout the Atlantic Ocean and are fairly common off the east coast of North America.
The global population of Great Shearwaters is estimated around 15 million, most of which nest on just a few tiny Tristan Islands in the remote South Atlantic. At least 10 million birds nest on Tristan de Cunha alone, an area of less than 40 square miles.
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Audubon Field Guide