简介:In the ice-gripped en影音vironment of Alaska's Admiral先锋ty Island, summer offers the briefest of respites. Year-round residents such as bears and seals turn to the salmon-filled 字幕waterways for sustenance. Meanwhile, migrants descend in droves, from humpback whales to over 140 million seabirds--资源almost half the birds in th中文e Northern Hemisphere.详情