简介:In the ice-gripped environment of Alaska's Admiralty Island, summer offers the briefest of respit在线观看es. Year-round resi中文dents such as bears and seals turn to 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 Hemisp网站he字幕re.详情