Бойдов буревестник Puffinus boydi

Small to medium shearwater that breeds only on Cape Verde islands. Closely related to Audubon's and Barolo Shearwaters. Note the dark head and that the eye does not stand out against pale face as it does in Barolo's Shearwater. Also note the long tail, dark undertail coverts, and underwing coverts white with variable dark markings. Bill all dark.