>>42967117Bats grip with their feet and when walking on the ground mostly use their wings to stride and propel themselves.
Evolution goes with whatever it first finds which works well enough and runs with it. The Best example is the panda’s thumb:
>Is a tree climbing creature with a thumb for grasping.>Becomes a ground walking animal and evolves its thumb into another finger.>Becomes a panda and needs a thumb for grasping again.>Evolves a new pseudo thumb out of its wrist. 