'It flew right over Alaska and it landed just west of Herschel Island, at Qikiqtaruk [Territorial Park], along the coast along the Yukon's North Slope,' Cameron Eckert, a conservation biologist with Yukon Parks and a bird enthusiast, said of the bar-tailed godwit.

Climate change is causing trouble on Herschel Island.

Tom Jung and Dave Mossop were monitoring falcons on Yukon's Arctic coastal plain when they spotted a beaver dam, made of shrubs. 'This was a bit of a unique observation.'

Canadian researchers learned that local Inuvialuit hunters had spotted beavers in the region in 2008 and 2009. Those sightings are the first documented signs of North American beaver occupancy on the Beaufort coastal plain.

Herschel Island has seen a lot of people come and go. The Inuvialuit have used the place, known as Qikiqtaruk in Inuvialuktun, for at least 1,000 years.

Darren Nasogaluak has an unusual problem.As the mayor of Tuktoyaktuk, a small Inuvialuit hamlet on the coast of the Beaufort Sea, he has had to watch bits of his community wash away over the years.