The Arctic tern makes the longest-known migration of any bird we know, by travelling from the Arctic to the Antarctic and back again.
One tern was ringed in the north of England and arrived in Australia 115 days later, having flown an average distance of 160 km per day. The short-tailed shearwater, which breeds on offshore islands near Australia, has an annual migration all round the Pacific. It passes through Japan, Alaska, Canada and Fiji before returning home again to breed.
Picture credit: google