About 11,000 km (6,835 mi) It is flown over 8 to 9 days by the bar-tailed godwit subspecies Limosa lapponica baueri which breeds in Alaska and migrates across the Pacific Ocean to overwinter in New Zealand or eastern Australia. The return journey is almost as demanding, being accomplished in two steps with a stopover in the Yellow Sea. The 4,800 km distance is the length of the staggered migration of the Monarch butterfly south to Mexico.
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?
