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a.k.a. Greater Shearwater
- Puffinus gravis
Identification
Length 18" (46 cm), wingspan 42-44" (107-112 cm). Gray-brown upper parts with dark cap, U-shaped white band at base of tail. White of underside extends up sides of neck, sometimes across nape. Thin dark bill.
Similar Species
Cory's Shearwater is about the same size with heavier yellow bill, dark head, clean white underwing, and blunt broad wings.
Manx Shearwater is much smaller with no white collar, totally white belly and undertail coverts, and much more blackish.
Audubon's Shearwater is much smaller with short stubby wings with no white collar, long tail, dark undertail coverts, and white spot near eye.
