Black-vented shearwater Black-vented shearwater The black-vented shearwater ("Puffinus opisthomelas") is a species of seabird. The bird is 30–38 cm in size, with a 76–89 cm wingspan. Formerly considered a subspecies of the Manx shearwater, its actual relationships are unresolved. This species is pelagic, occurring in the Pacific Ocean and the Gulf of California. It comes closer to land than most other shearwaters, so it sometimes can be seen from shore. It predominantly nests on offshore islands off north and western Baja California, namely Isla de Guadalupe, Islas San Benito and Isla Natividad. It is fairly common off the United States coast of
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