Which migratory bird covers the longest distance during its journey?

Question

A subspecies of which bird or insect makes an annual migration of - in terms of direct flight - almost 14,500 km (9,000 miles) each way (total 29,000 km, 18,000 miles), each leg of which is non-stop?

Answer 1

The Arctic tern Sterna paradisaea has the longest distance migration of any bird, and sees more daylight than any other, moving from its Arctic breeding grounds to the Antarctic non-breeding areas.

One Arctic tern, ringed (banded) as a chick on the Farne Islands off the British east coast, reached Melbourne, Australia in just 3 months from fledging, a sea journey of over 22,000 km.