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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.
Their ability to spread further south is restricted as their prey hunting method, pursuit diving, becomes less efficient in warmer waters. 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 ...
After fledging, the juveniles learn to feed themselves, including the difficult method of plunge-diving. [31] They will fly south to winter with the help of their parents. [32] Arctic terns are long-lived birds that spend considerable time raising only a few young, and are thus said to be K-selected. [33]
The bird's down was in high demand in Europe, a factor that largely eliminated the European populations by the mid-16th century. Around the same time, nations such as Great Britain began to realize that the great auk was disappearing and it became the beneficiary of many early environmental laws, but despite that the great auk were still hunted.
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 ...
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.
The yellow-billed loon is an Arctic species, breeding primarily along the coasts of the Arctic Ocean as far north as 78° N and wintering on sheltered coastal waters of the northern Pacific Ocean and the northwestern coast of Norway. [2] It has been recorded as a breeding bird in Russia, Canada and the United States. [1]
A new study has revealed that a marine heat wave caused a massive die-off of common murres around Alaska between 2014-2016. Biologists say the tuxedo-styled birds dive and swim in the ocean to eat ...