Despite being called petrels, Procellaria species are thought to be more closely related to Calonectris shearwaters than to other petrels (4). Indeed, grey petrels resemble the larger shearwaters in their relatively bulky bodies (5). The crown, wings, back and tail are a dark ash gray colour, while the cheeks and the sides and nape of the neck are pale grey (2). By contrast, the throat, chest and abdomen are white (2).