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The diet of the Arctic tern varies depending on location and time, but is usually carnivorous. In most cases, it eats small fish or marine crustaceans . [ 10 ] [ 19 ] Fish species comprise the most important part of the diet, and account for more of the biomass consumed than any other food.
The arctic tern is K-selected, caring for and aggressively defending a small number of young. Parents feed them fish for a considerable time, and help them fly south to winter. Arctic terns are long-lived birds, with many reaching twenty years of age. They eat mainly fish and small marine invertebrates. The species has an estimated one million ...
the Arctic and sub-Arctic regions of Europe, Asia, and North America (as far south as Brittany and Massachusetts). River tern: Sterna aurantia: inland rivers from Iran east into the Indian Subcontinent and further to Myanmar to Thailand Black-bellied tern: Sterna acuticauda: Pakistan, Nepal, India and Bangladesh, with a separate range in ...
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The common tern may attempt to steal fish from Arctic terns, [98] but might itself be harassed by kleptoparasitic skuas, [99] laughing gulls, [100] roseate terns, [101] or by other common terns while bringing fish back to its nest. [98] In one study, two males whose mates had died spent much time stealing food from neighbouring broods. [102]
The Antarctic tern does not migrate like the Arctic tern does, but it can still be found on a very large range. This tern species is actually more closely related to the South American tern. [2] Gulls, skuas and jaegers are the primary predators of the bird's eggs and young. The Antarctic tern can be further divided into six subspecies.
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The Arctic cod is also part of the diet for many of the birds in Lancaster Sound and marine mammals. Many narwhal, beluga, bowhead whale, ringed, bearded and harp seals, walrus, polar bears, thick-billed murres, black-legged kittiwakes, northern fulmars, black guillemots, Arctic terns, ivory gulls and snow geese all occupy the area.