简介:In the ice-gripped environment of Alaska's Admiralty Island, summer 人成offers the briefest of respites. Year-round residents such as bears and seals turn to the salmon-filled waterways for sustena免费nce. Meanwhile, migrants descend in droves, from humpback wh视频ales to over 140 million seabirds--almost half th国产e birds in the Northern Hemisphere.详情