Auk

AlcidaealcidaukletauksalcidsmurreletAlcinaeAlciniFraterculinae
An auk or alcid is a bird of the family Alcidae in the order Charadriiformes.wikipedia
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Uria

murremurresguillemots
The alcid family includes the murres, guillemots, auklets, puffins, and murrelets. Some species, such as the Uria guillemots (murres), nest in large colonies on cliff edges; others, like the Cepphus guillemots, breed in small groups on rocky coasts; and the puffins, auklets and some murrelets nest in burrows.
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.

Puffin

puffinsFraterculapuffins,
The alcid family includes the murres, guillemots, auklets, puffins, and murrelets. Some species, such as the Uria guillemots (murres), nest in large colonies on cliff edges; others, like the Cepphus guillemots, breed in small groups on rocky coasts; and the puffins, auklets and some murrelets nest in burrows.
Puffins are any of three small species of alcids (auks) in the bird genus Fratercula with a brightly coloured beak during the breeding season.

Aethia

auklets
The alcid family includes the murres, guillemots, auklets, puffins, and murrelets.
Aethia is a genus of four small (85–300g) auklets endemic to the North Pacific Ocean, Bering Sea and Sea of Okhotsk and among some of North America's most abundant seabirds.

Charadriiformes

charadriiformshorebirdswader
An auk or alcid is a bird of the family Alcidae in the order Charadriiformes.

Guillemot

Guillemotsmurres
The alcid family includes the murres, guillemots, auklets, puffins, and murrelets.
Guillemot is the common name for several species of seabird in the Alcidae or auk family (part of the order Charadriiformes).

Penguin

penguinsSpheniscidaeSphenisciformes
Auks are superficially similar to penguins having black-and-white colours, upright posture and some of their habits. The feeding behaviour of auks is often compared to that of penguins; both groups are wing-propelled pursuit divers.
The English word is not apparently of French, Breton or Spanish origin (the latter two are attributed to the French word pingouin "auk"), but first appears in English or Dutch.

Brachyramphus

murrelets
The alcid family includes the murres, guillemots, auklets, puffins, and murrelets.
These are unusual members of the auk family, often nesting far inland in forests or on mountain tops.

Least auklet

leastAethia pusilla
Extant auks range in size from the least auklet, at 85 g (3 oz) and 15 cm, to the thick-billed murre, at 1 kg and 45 cm.
The least auklet (Aethia pusilla) is a seabird and the smallest species of auk.

Thick-billed murre

Brünnich's guillemotBrunnich's guillemotthick-billed guillemot
Extant auks range in size from the least auklet, at 85 g (3 oz) and 15 cm, to the thick-billed murre, at 1 kg and 45 cm.
The thick-billed murre or Brünnich's guillemot (Uria lomvia) is a bird in the auk family (Alcidae).

Common murre

common guillemotguillemotguillemots
Auks are pelagic birds, spending the majority of their adult life on the open sea and going ashore only for breeding, although some species — like the common guillemot — spend a great part of the year defending their nesting spot from others.
The common murre or common guillemot (Uria aalge) is a large auk.

Bird colony

coloniesbreeding colonycolonial
Some species, such as the Uria guillemots (murres), nest in large colonies on cliff edges; others, like the Cepphus guillemots, breed in small groups on rocky coasts; and the puffins, auklets and some murrelets nest in burrows.
Colonial nesting birds include seabirds such as auks and albatrosses; wetland species such as herons; and a few passerines such as weaverbirds, certain blackbirds, and some swallows.

Bird

birdsAvesavian
An auk or alcid is a bird of the family Alcidae in the order Charadriiformes.
Although flightless, penguins use similar musculature and movements to "fly" through the water, as do auks, shearwaters and dippers.

Cepphus

guillemot
Some species, such as the Uria guillemots (murres), nest in large colonies on cliff edges; others, like the Cepphus guillemots, breed in small groups on rocky coasts; and the puffins, auklets and some murrelets nest in burrows.
Cepphus is a genus of seabirds in the auk family also referred to as true guillemots or, in North America, simply as guillemots.

Wader

shorebirdwading birdwading birds
However, genetic analyses have demonstrated that these peculiarities are the product of strong natural selection instead: as opposed to, for example, plovers (a much older charadriiform lineage), auks radically changed from a wading shorebird to a diving seabird lifestyle.
Waders are members of the order Charadriiformes, which includes gulls, auks and their allies.

Mancallinae

PraemancallaMancallaMiomancalla
The flightless subfamily Mancallinae, which was apparently restricted to the Pacific coast of southern North America and became extinct in the Early Pleistocene, is sometimes includes in the family Alcidae under some definitions.
Mancallinae is an extinct subfamily of prehistoric flightless alcids that lived on the Pacific coast of today's California and Mexico from the late Miocene epoch to the early Pleistocene (ranging from at least 7.4 million to 470,000 years ago).

Hydrotherikornis

Two very fragmentary fossils are often assigned to the Alcidae, although this may not be correct: Hydrotherikornis (late Eocene) and Petralca (Late Oligocene).
Hydrotherikornis oregonus is an extinct species of auk.

Lari

Thus, today, the auks are no longer separated in their own suborder ("Alcae"), but are considered part of the Lari suborder which otherwise contains gulls and similar birds.
The auks are now placed into the Lari too, following recent research.

Synthliboramphus

?Synthliboramphus sp.murrelets
mtDNA cytochrome b sequence and allozyme studies confirm these findings except that the Synthliboramphus murrelets should be split into a distinct tribe, as they appear more closely related to the Alcini – in any case, assumption of a closer relationship between the former and the true guillemots was only weakly supported by earlier studies.
Synthliboramphus is a small genus of seabirds in the auk family from the North Pacific.

Little auk

DovekieAlle alleAlle
The little auk or dovekie (Alle alle) is a small auk, the only member of the genus Alle.

Great auk

Pinguinus impennisPinguinusPinguinus alfrednewtoni
Apart from the extinct great auk, all auks are notable for their ability to "fly" under water as well as in the air.
The great auk (Pinguinus impennis) is a species of flightless alcid that became extinct in the mid-19th century.

Wing

wingsaircraft wingWing area
The feeding behaviour of auks is often compared to that of penguins; both groups are wing-propelled pursuit divers.
Various species of penguins and other flighted or flightless water birds such as auks, cormorants, guillemots, shearwaters, eider and scoter ducks and diving petrels are avid swimmers, and use their wings to propel through water.

Ancient murrelet

Synthliboramphus antiquusAncient murrelet (''Synthliboramphus antiquus'')
The ancient murrelet (Synthliboramphus antiquus) is a bird in the auk family.

Pigeon guillemot

Cepphus columba
The pigeon guillemot (Cepphus columba) is a species of bird in the auk family, Alcidae.

Scripps's murrelet

This auk breeds on islands off California and Mexico.

Black guillemot

tystiestystieblack guillemots
The black guillemot or tystie (Cepphus grylle) is a medium-sized seabird of the alcid family, Alcidae, native throughout northern Atlantic coasts and eastern North American coasts.