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 s在线观看almon-filled waterways for sustenance. Meanwhile, migrants descend in droves, from hump视频back wh免费ales to over 140 milli哔哩on seabirds--almost half the birds i哔哩n the Northern Hemisphere.详情