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{{Taxonomy
|name=Auk
|image=Murre and Razorbill.jpg
|caption=Common murre, ''Uria aalge''<br/>Razorbill auk, ''Alca torda''
|domain=Eukaryota
|kingdom= Animalia
|subkingdom=Bilateria
|branch=Deuterostomia
|superphylum=
|phylum=Chordata
|subphylum=Vertebrata
|infraphylum=Gnathostomata
|microphylum=
|superdivision=
|division=
|subdivision=
|superclass=Tetrapoda
|class=Aves
|subclass=Neornithes
|infraclass=Neoaves
|superorder=Passerimorphae
|order=Charadriiformes
|suborder=
|infraorder=Charadriides
|superfamily=Laroidea
|family=Alcidae
}}
'''Auks''' or '''alcids''', a general term for 25 species of marine diving birds of the family Alcidae, and found in the higher latitudes of the Northern Hemisphere. The family includes auklets, murres, gillemots and puffins, with the word "auk" generally restricted to three species: the [[razorbill auk]] (''Alca torda''), the [[little auk]] (''Alle alle''), and the extinct [[great auk]] (''Pinguinus impennis'').
==Description==
Auks are the northern equivalent of [[penguin]]s, of which there is a resemblance in many ways. The body is stocky with a large head, and they bear a short neck, legs, and tail. Length varies among species, from 6.5 inches to 30 inches. Beaks are long and pointed (murres); deep and laterally compressed (razorbills, puffins); or stubby (little auks). Plumage is generally monochrome: black or brown above a white belly in most species, with the bold colors of the puffin's beaks being a striking exception.
Auks are excellent divers, using their half-folded wings as paddles underwater as they strike at prey. Their webbed feet are set far back on their bodies and used for steering; the position also gives them an upright appearance when standing, and an awkward gait when walking, similar to penguins. In fact, the largest of the auks - the [[great auk]] - was once known as the original penguin before those birds were discovered in the Southern Hemisphere.
==Diet==
Auks are known to take small fish, shellfish, worms, and crustaceans, but the principal prey is fish. Prey is taken in deep water, and several species usually hunt the same fishing area. Little to no competition occurs between the birds within the area, as they strike at differing sizes and types of prey; a puffin with catch small fish no more than two inches in length, while a larger murre with catch those fish double the size.
==Species==
==Species==
*[[Razorbill]], ''Alca torda''
Family Alcidae
*[[Dovekie]], ''Alle alle''
*'''Subfamily Alcinae'''
*[[Atlantic Puffin]], ''Fratercula arctica''
**'''Tribe Alcini'''; typical auks and murres
*[[Common murre]], ''Uria aalge''
***Genus ''Alca''
****[[Razorbill auk]], ''Alca torda''
***Genus ''Alle''
****[[Little auk]], ''Alle alle''
***Genus ''Pinguinus''
****[[Great auk]], ''Pinguinus impennis'' (extinct)
***Genus ''Uria''
****[[Common murre]], ''Uria aalge''
****[[Thick-billed murre]], ''Uria lomvia''
**'''Tribe Brachyramphini'''; brachyramphine murrelets
***Genus ''Brachyramphus''
****[[Kittlitz's Murrelet]], ''Brachyramphus brevirostris''
****[[Long-billed murrelet]] ''Brachyramphus perdix''
****[[Marbled Murrelet]], ''Brachyramphus marmoratus''
**'''Tribe Cepphini'''; true guillemots
***Genus ''Cepphus''
****[[Black guillemot]], ''Cepphus grylle''
****[[Pigeon guillemot]], ''Cepphus columba''
****[[Spectacled guillemot]], ''Cepphus carbo''
**'''Tribe Synthliboramphini'''; murrelets
***Genus ''Synthliboramphus''
****[[Ancient murrelet]], ''Synthliboramphus antiquus''
****[[Craveri's murrelet]], ''Synthliboramphus craveri''
****[[Guadalupe murrelet]], ''Synthliboramphus hypoleucus''
****[[Japanese murrelet]], ''Synthliboramphus wumizusume''
****[[Scripps's murrelet]], ''Synthliboramphus scrippsi''
* '''Subfamily Fraterculinae'''
** '''Tribe Aethiini''' – auklets
***Genus ''Aethia''
****[[Crested auklet]], ''Aethia cristatella''
****[[Least auklet]], ''Aethia pusilla''
****[[Parakeet auklet]], ''Aethia psittacula''
****[[Whiskered auklet]], ''Aethia pygmaea''
***Genus ''Ptychoramphus''
****[[Cassin's auklet]], ''Ptychoramphus aleuticus''
**'''Tribe Fraterculini'''; puffins
***Genus ''Cerorhinca''
****[[Rhinoceros auklet]], ''Cerorhinca monocerata''
***Genus ''Fratercula''
****[[Atlantic puffin]], ''Fratercula arctica''
****[[Horned Puffin]], ''Fratercula corniculata''
****[[Tufted Puffin]], ''Fratercula cirrhata''
[[Category: Auks]]
[[Category:Auks]]