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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.
Auks or alcids are birds of the family Alcidae in the order Charadriiformes. [1] The alcid family includes the murres , guillemots , auklets , puffins , and murrelets . The family contains 25 extant or recently extinct species that are divided into 11 genera.
The best chance for adult razorbill to avoid predation is by diving. Arctic foxes and polar bears can also predate significant numbers of adults, eggs, and chicks in some years in the north of the species' range. [46] Razorbill eggs were collected until the late 1920s in Scotland's remote St Kilda islands by their men scaling the cliffs.
The three smaller skuas, the Arctic skua, the long-tailed skua, and the pomarine skua, are called jaegers in North American English. The English word "skua" comes from the Faroese name for the great skua , skúgvur [ˈskɪkvʊɹ] , with the island of Skúvoy renowned for its colony of that bird.
These birds forage for food like other auks by swimming underwater. They mainly eat crustaceans , especially copepods , of which a 150 g (5.3 oz) bird requires ~60,000 individuals per day (equivalent to 30 g [1.1 oz] of dry food weight), [ 19 ] but they also eat small invertebrates such as mollusks , as well as small fish.
A rare Arctic bird was spotted entangled in fishing line near a California pier, and rescuers rushed to help, a nonprofit said. Beachgoers spotted the yellow-billed loon Jan. 19 off the Cabrillo ...
The most widely distributed member of the loon or diver family, it breeds primarily in Arctic regions, and winters in northern coastal waters. Ranging from 55 to 67 centimetres (22 to 26 in) in length, the red-throated loon is the smallest and lightest of the world's loons. In winter, it is a nondescript bird, greyish above fading to white below.
They are also long-lived: a Manx shearwater breeding on Copeland Island, Northern Ireland, was (as of 2003/2004) the oldest known wild bird in the world; ringed as an adult (when at least 5 years old) in July 1953, it was retrapped in July 2003, at least 55 years old (also now exceeded, by a Laysan albatross). Manx shearwaters migrate over ...