Barolo shearwater a distinct species (Sangster et al. 2005), as has "Clements Checklist". The American Ornithologists' Union followed in 2013. Features that distinguish the Barolo shearwater from the Manx shearwater and other North Atlantic "Puffinus" species include the pale face, silvery panel in the upperwings, shorter more rounded wings, and blue feet. As well as the pale face with the darkly contrasting eye. The Baraolo shearwater occurs in the Macaronesian Islands and breeds on the Azores, Desertas, Selvagens and Canary islands. The largest colony, of 1400 pairs, occurs on the Selvagen Islands. The Barolo shearwater feeds in the upper 15m of the
Buller's shearwater blackish also; the two black areas do not meet at the hand however; the area between them is a rather light grey, under bright light it may appear almost white. With the bird facing upwards, the pattern gives the impression of a broken black "M", with light grey interspersing areas. The underside is bright white; on the head the upperside's grey extends town to eye height and the white cheeks may shine up conspicuously, as in the smaller shearwaters of "Puffinus sensu stricto". The rectrices are blackish and the tail is wedge-shaped; bill and iris are dark. Fledged juveniles already