简介:In the ice-gripped environment of Alaska's Admiralty Is大片land, summer offers the briefest of respites. Year-round r制作esidents such as bears and seals turn to th国产片e salmo美国n-filled waterways for sustenance. Meanwhile, migrants descend in droves, from humpback whales to over 140 million seabir水准ds--almost half the birds in the Northern Hemisphere.详情