It will take nearly a month for these deer to migrate to their winter pastures.

让这些鹿乖乖地迁到冬季牧场要花近一个月的时间。

But we can be much more specific than this even, because we're clearly looking at these animals in the autumn, at the time of rutting and migration to winter pastures.

我们还可以更进一步地具体描绘，显然我们观察到的，是秋天时向冬季牧地进行大迁移的驯鹿。