简介:In the ice-gripped environment of Alaska'在线s Admiralty Island, summer offers the briefest中文 of respites. 字幕Year-round residents such as bea人妻rs and seals turn to 熟女the salmon-filled waterways for sustenance. Meanwhile, migrants descend in droves, from humpback whales to over 140 million seabirds--almost half the birds in the Northern Hemisphere.详情