A black guillemot is a variety of seabird, Latin name Cepphus grylle, of the auk family.

The scientific name for the Pigeon guillemot is Cepphus columba. It is a species of seabird in the auk family, Alcidae, that is found in coastal regions of the North Pacific Ocean.

Asa Clifford Thoresen has written:

'Breeding activities of the pigeon guillemot, Cepphus columba columba (Pallas)' -- subject(s): Pigeon guillemot

'Breeding behavior and growth rates of Cassin's auklet Ptychoramphus aleutica (Pallias)' -- subject(s): Sea birds, Alcidae

Many species. Diving ducks, for one, and pelicans, which enter the water from considerable heights at very high speeds. There are others as well.