This great butterfly, often almost three and a half inches in wingspread, has brilliant red spots glowing on its underwings against a delicate Japanese blue color so strangely lovely that the design looks almost like a scene from fairyland. In spite of its exquisite beauty, it likes to alight on such dirty things as dog dung and other manure or decaying material left along a roadway. It may even drink the juices of rotting animal bodies, as it is frequently found upon them, apparently thoroughly enjoying itself.