- The brown bear migrated from Asia to North America 50–100 thousand years ago, but until the end of the Wisconsin glaciation, it lived only in Alaska. The short-faced bear, occupying the same ecological niche, hindered its further expansion south and east across the continent.
地理灰熊
在这里我们介绍灰熊的栖息地，以及他适宜的环境条件。
灰熊：它是怎样的