简介:In the ice-gripped envir午夜onment of Alaska's Admiralty Island, summer offers the briefest of respites. Year-round residents such as bears and seals turn to the salmon-filled w国产aterways f免费or sustenance. Meanwhile, migrants d高清escend in droves, from humpback whales to over 140 million seabirds--almost half t视频he birds in the Northern Hemisphere.详情