Like other gliding mammals , the Feathertail Glider has a skin membrane between the fore and hind legs ; thicker than that of the other marsupials like the Sugar Glider , but smaller in proportion , extending only between the elbows and knees . Like other gliding mammals , the Feathertail Glider has a skin membrane between the fore and hind legs , thicker than that of the other marsupials like the Sugar Glider , but smaller in proportion , extending only between the elbows and knees .