简介:In the ice-gripped environment of Alaska's Admiralty Island, summer offers the briefest of respites. Year-rou最近nd residents such as bears and seals turn to the salmon-filled waterways for sustenance. Meanwhile, migrants descend in droves, from h免费umpback whales to ove中文r 140 mi字幕llion se新中文abirds--almost half the birds in the Northern Hemisphere.详情