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The speed at which small fish (which along with krill are the auk's principal prey) can swim doubles as the temperature increases from 5 to 15 °C (41 to 59 °F), with no corresponding increase in speed for the bird. The southernmost auks, in California and Mexico, can survive there because of cold upwellings. The current paucity of auks in the ...
[21]: 32 The great auk was known to dive to depths of 75 m (250 ft) and it has been claimed that the species was able to dive to depths of 1 km (3,300 ft; 550 fathoms). [19]: 311 To conserve energy, most dives were shallow. [43] It also could hold its breath for 15 minutes, longer than a seal.
The little auk was formally described in 1758 by the Swedish naturalist Carl Linnaeus in the tenth edition of his Systema Naturae. He placed it with the other auks in the genus Alca and coined the binomial name Alca alle. [10] Linnaeus specified the type locality as Ocean of Arctic, Europe and America but this is now restricted to Scotland. [11]
The common murre or common guillemot (Uria aalge) is a large auk.It has a circumpolar distribution, occurring in low-Arctic and boreal waters in the North Atlantic and North Pacific.
The black-throated loon (Gavia arctica), also known as the Arctic loon and the black-throated diver, is a migratory aquatic bird found in the northern hemisphere, primarily breeding in freshwater lakes in northern Europe and Asia. It winters along sheltered, ice-free coasts of the north-east Atlantic Ocean and the eastern and western Pacific Ocean.
It is the closest living relative of the extinct great auk (Pinguinus impennis). [4] Historically, it has also been known as "auk", [5] "razor-billed auk" [6] and "lesser auk". [7] Razorbills are primarily black with a white underside. The male and female are identical in plumage; however, males are generally larger than females.
The Atlantic puffin (Fratercula arctica), also known as the common puffin, is a species of seabird in the auk family.It is the only puffin native to the Atlantic Ocean; two related species, the tufted puffin and the horned puffin being found in the northeastern Pacific.
The thick-billed murre or Brünnich's guillemot (Uria lomvia) is a bird in the auk family (Alcidae). This bird is named after the Danish zoologist Morten Thrane Brünnich.The very deeply black North Pacific subspecies Uria lomvia arra is also called Pallas' murre after its describer.