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The longest migration ever recorded in any animal Miniature new transmitters recently revealed that the 4-ounce (113-gram) bird follows zigzagging routes between Greenland and Antarctica each year. In the process, the arctic tern racks up about 44,000 frequent flier miles (71,000 kilometers). As Arctic Terns can live over 30 years, the total distance flown in a tern's lifetime may exceed 2,4 million km, that's équivalent to around 3 return journeys to the Moon !!!!
The entire northern hemisphere Arctic area. It is a circumpolar animal.