简介:In the ice-gripped environment of Alaska's Admiralty Island, summer offers the briefest of respites. Year-round residents such as bears and seals turn to the salmo视频n-filled wate好爽rways for su快点stenance. Meanwh视频ile, migrant一点s descend in droves, from humpback whales to over 140 million seabirds--almost half the birds in the Northern Hemisphere.详情