简介:In the ice-gripped environmen女医生t of Alaska's Admiralty Island, summer offers the briefest of respi在线观看tes. Year-round residents such as bears and seals turn to the salmon-filled waterways for sustenance. Meanw年轻hile, migrants descend in droves, from humpback whales to over 140 million seabirds--almost half the birds in the Northern Hemisphere.详情