Mediterranean Shearwater Puffinus mauretanicus (upper 4 pictures) &
Sooty Shearwater Puffinus griseus (lower 12 pictures, all showing the same bird). The hint of a light chin and upper breast appears to change with light condition, as was confirmed on several video recordings taken as well. Wing shape, overall warm brown color, breast and belly pattern and underwing pattern reveal its identity as Sooty.