Sandhill cranes have travelled all the way from New Mexico. 沙丘鹤则从新墨西哥州一路赶到这里
which is why little auks have kept the ability to fly. 所以小海雀仍然需要保持飞行能力
The musk oxen have recently given birth. 麝牛最近生了幼仔
These giants have the strength to smash through the frozen crust 这种体型巨大的动物有足够的力量砸出冰窟窿
They have stayed here, braving the northern winter, 绒鸭没有迁徙到温暖的南方
They all have the same goal, a polynya, 它们都有相同的目标--冰间湖(冰穴)
Crammed into this scrum, the birds are remarkably good-natured. But they have to be. 这些企鹅性情特别温和 这是环境使然
The females no longer have the energy to incubate. 雌企鹅再也没有孵蛋的力气
They have travelled over 5,000 miles to reach these waters. 它们经过5000英里的漫长旅程终于来到了这片水域
But the skuas have not chanced upon the petrels, they've been waiting for them. 但是贼鸥碰到海燕并非机遇使然, 它们早就等着下手