Which bird migrates the longest distance annually?

The story behind the answer

Arctic Tern is correct: it migrates from Arctic breeding grounds to the Antarctic and back each year, often exceeding 70,000–90,000 km—the longest annual migration of any animal. It “chases summer,” spending most of its life in daylight at high latitudes. By contrast, the Bar-tailed Godwit holds the record for the longest non-stop flight, not total annual distance; Sooty Shearwaters travel far but typically less than terns; Barn Swallows migrate shorter intercontinental routes.

Memory tip: “The tern turns the globe”—Arctic Terns virtually circle from pole to pole. Their efficient, wind-assisted zigzag routes and lightweight bodies help conserve energy over vast oceans, letting them outdistance all other birds year after year.