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Like most terns, the Arctic tern has high aspect ratio wings and a tail with a deep fork. [19] The adult plumage is grey above, with a black nape and crown and white cheeks. The upperwings are pale grey, with the area near the wingtip being translucent. The tail is white, and the underparts pale grey. Both sexes are similar in appearance.
Terns are generally long-lived birds, with individuals typically returning for 7–10 breeding seasons. Maximum known ages include 34 for an Arctic tern and 32 for a sooty. Although several other species are known to live in captivity for up to 20 years, their greatest recorded ages are underestimates because the birds can outlive their rings. [5]
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.
A five-year, $17 million contract for the company that administers the city’s controversial entrance exam for specialized high schools was finally approved Wednesday after a highly-anticipated ...
Aleutian terns are reported to spend less time brooding chicks than do Arctic terns; consequently, Aleutian tern mortality rate is higher during the chick stage. [ 6 ] The eggs typically have an elongate ovate shape [ 12 ] and range from 40–46 mm (1.6–1.8 in) length.
Meet the experts: Thomas Russo, M.D., professor and chief of infectious disease at the University at Buffalo in New York; infectious disease expert Amesh A. Adalja, M.D., senior scholar at the ...
Sprinkle in the flour, whisking to form a roux. Reduce the heat to medium low and cook, stirring, for 2 minutes more. Slowly add the milk and cream, whisking until smooth, and cook until thickened ...