简介:In the i计划ce-gripped environment of Alaska's Admiralty Island, summer offers家庭 the briefest of respites. Year-rou免费观nd residents such as bears and seals turn to the salmon-filled waterways for sustenance. Meanwhile, migrants descend in droves, from humpback whales to ov整版er 140 million seabirds--almost half the birds i看完n the Northern Hemisphere.详情