Description
English: Black Guillemot resting on a cliff in Reykjanes, Iceland
Date 4 July 2010
Source Own work
Author Boaworm https://commons.wikimedia.org/wiki/User:Boaworm
Source: https://commons.wikimedia.org/wiki/File:Black_Guillemot_Cepphus_grylle.jpg

The black guillemot or tystie (Cepphus grylle) is a medium-sized alcid. The genus name Cepphus is from Ancient Greek kepphos, a pale waterbird mentioned by Greek authors including Aristotle. The species name grylle was the local dialect name for this bird in Gotland at the time of Linnaeus's visit there in 1741. The English word "guillemot" is from French guillemot probably derived from Guillaume, "William". The black guillemots' breeding habitat is rocky shores, cliffs and islands on northern Atlantic coasts in eastern North America as far south as Maine, and in western Europe as far south as Ireland. Order: Charadriiformes, Suborder: Lari, Family: Alcidae.