They often choose an area such as the base of a bush , tree , or other vegetation for their natural hibernaculum 它们常常选择有矮灌木、树木和其他植物的地带作为它们的冬眠场所。
2.
In the west , e . pasilla * erutf / aund ? chrysophrys are the major species . it is leaded by the different of their multplying section and hibernaculum 产生差异的主要原因是它们的繁殖地、越冬地有差异，从而导致迁徙路线的差异。
