Species
Cepphus columba (Pigeon guillemot)
The pigeon guillemot (Cepphus columba) is a species of bird in the auk family, Alcidae. One of three species in the genus Cepphus, it is most closely related to the spectacled guillemot. There are five subspecies of the pigeon guillemot; all subspecies, when in breeding plumage, are dark brown with a black iridescent sheen, with a distinctive wing patch broken by a brown-black wedge. Its non-breeding plumage has a mottled grey and black upperparts and white…