The gecko can in vertical wall crawling be because on his/her toe has several thousand the bristle, this is the very slender hair structure, can form the vander waal action with the object surface.

• 壁虎能够在垂直墙壁爬行是由于其脚趾上有数千根“刚毛”，这是非常纤细的毛发结构，能够与物体表面形成范德华作用力。