Family Alcidae

Aethia - Aethia is a genus of four small auklets endemic to the North Pacific Ocean, Bering Sea and Sea of Okhotsk and among some of North America's most abundant seabirds.

Alca - Alca may refer to:

Alle - The Łyna is a tributary of the Pregolya River, and has a total length of 264 km and a basin area of 7,126 km² .

Brachyramphus - Brachyramphus is a small genus of seabirds from the North Pacific.

Cepphus - Cepphus is a genus of seabirds in the auk family also referred to as true guillemots or, in North America, simply as guillemots.

Cerorhinca - It ranges widely across the North Pacific feeding on small fish and nesting in seabird colonies.

Fratercula - Puffins are any of three small species of auk in the bird genus Fratercula with a brightly coloured beak in the breeding season.

Pinguinus - The Great Auk was 75 to 85 centimetres tall and weighed around 5 kilograms , making it the largest member of the alcid family.

Ptychoramphus - The Cassin's Auklet is a small nondescript auk.

Synthliboramphus - Endomychura

Uria - Uria is a genus of seabirds in the auk family known in Britain as guillemots, in most of North America as murres, and in Newfoundland and Labrador as turr.