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Arctic tern
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An Arctic Tern (Sterna paradisaea) with white and gray plumage, a black cap, and a red beak stands on a lichen-covered rock. An Arctic tern (Sterna paradisaea) with white wings, black cap, and red bill soars against a clear blue sky. Arctic tern (Sterna paradisaea).
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Arctic tern (Sterna paradisaea).
Arctic tern (Sterna paradisaea).

Arctic tern

bird
Also known as: Sterna paradisaea
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Arctic tern (Sterna paradisaea).
1 of 2
Arctic tern (Sterna paradisaea).
Arctic tern (Sterna paradisaea).
2 of 2
Arctic tern (Sterna paradisaea).

Arctic tern, (Sterna paradisaea), tern species that makes the longest annual migration of any bird. It breeds in the southerly reaches of the Arctic and winters in the Antarctic, making its migration a round-trip of 60,000 to 82,000 km (roughly 37,000 to 51,000 miles). Its appearance—white with a black cap and grayish wings—is similar to that of the common tern (Sterna hirundo), its frequent companion.

This article was most recently revised and updated by John P. Rafferty.