A juvenile bar-tailed godwit has flown from Alaska in the US to Tasmania in Australia, covering a record 13,560kms without stopping.
© Johnny Madsen/AlamyA juvenile bar-tailed godwit has flown from Alaska in the US to Tasmania in Australia, covering a record 13,560kms without stopping.
A juvenile bar-tailed godwit - known only by its satellite tag number 234684 - has flown 13,560 kilometres from Alaska to the Australian state of Tasmania without stopping, appearing to set a new world record for marathon bird flights.

The five-month-old bird set off from Alaska on 13 October and satellite data appeared to show it did not stop during its marathon flight which took 11 days and one hour.

Tagged in Alaska, the bar-tailed godwit, Limosa lapponica, flew at least 13,560km (8,435 miles) before touching down at Ansons Bay in north-east Tasmania.

The previous record was held by an adult male of the same species - 4BBRW - that flew 13,000km (8,100 miles) last year, beating his own previous record of 12,000km the year before.
According to a Facebook post from the Pūkorokoro Miranda Shorebird Centre in New Zealand, 4BBRW's record had been "blown out of the water by this young upstart".

Scientists track the bird using a 5G satellite tag attached to its lower back.

According to data from the Max Planck Institute for Ornithology's bird tracking project, the migratory bird took a route to the west of Hawaii, continuing over open ocean and flying over the Pacific island nation of Kiribati on 19 October.

About two days later the bird would have seen land again, shooting over Vanuatu and continuing south taking a track about 620km east of Sydney and continuing between Australia's east coast and New Zealand.

On 23 October, the bird and any others flying with it took a sharp right and headed west to arrive at Tasmania on 25 October.

Sean Dooley, of BirdLife Australia, said: "The most amazing thing is that juveniles migrate separately to the adults. Adults take off from the Arctic sometimes up to six weeks earlier."

Juveniles would spend that time fattening-up for the long migration south. "That bird is likely to have been in a flock. This record is for continuous flying and it's just incredible," Dooley said.

He said the birds were able to shrink their internal organs to make more space for fat stores.

The Pūkorokoro Miranda Shorebird Centre said it had produced souvenir tea towels for the previous record holder 4BBRW and may now have to have a new set made.