简介:In the ice-gripped environment of Alaska's Admiralty Island, summer offers the briefest of respites. Year-round resi大片dents such as bears and seals turn to the salmon-filled waterways for sustenance. Meanwhile, migrants descend in droves, from h高清umpback whales to over 140 millio观看n seabirds--al播放器most half the birds in the 免费Northern Hemisphere.详情