Steven Kazlowski / Young Polar bear (Ursus maritimus) standing and trying to balance in shallow water along the Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...

Steven Kazlowski / Two curious young Polar bears (Ursus maritimus), Barter Island, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, October 2011

Erlend Haarberg / Bar-tailed godwit (Limosa lapponica) courtship display, male in flight, Finnmark, Norway, May

Erlend Haarberg / Bar-tailed godwit (Limosa lapponica) courtship display, Finnmark, Norway, May

Erlend Haarberg / Brown bear (Ursus arctos) at forest edge, Ovre-Pasvik National Park, Finnmark, Norway, May

Erlend Haarberg / Northern light above Ellenvatn Lake, Ovre-Pasvik National Park, Varanger, Finnmark, Norway, February 2007