'Amazing but also concerning': weird wildlife ventures to northern Alaska

Arctic Dispatches, part 2: As the Arctic heats up, residents of UtqiaAvik are experiencing first contact with unusual species that are making their way polewards

• Vanishing ice convulses Alaskans' way of life

Last July, Nagruk Harcharek was savouring a bucolic visit to a cabin that sits on the lip of the Chipp river, deep in the Alaskan Arctic, when something caught his eye. Shimmering on a rack where he hangs his caught whitefish to dry was, astonishingly, a dragonfly.

"I'd been going to camp there for 30 years and I'd never seen one, I couldn't freaking believe it," said Harcharek. "I was amazed. I just thought, 'Wow'."