简介:In the ice-gripped environment of Alaska's Admiralty Island, summer offers th直播e briefest of respites. Year-round residents such as bears and seals t体育urn to the salmo在线观看n-filled waterways for sustenance. Meanwhile, migrants descend in droves, from humpback whales to over 140 million免费 seabirds--almost half the birds in the 高清Northern Hemisphere.详情