made soon after I fell asleep reading the never ending story and listening to my husband talk about his research into pilly wiggins. He told me that one form that they often choose when not in thier traditional tiny humanoid with insectlike wings is that of a frog. Though they can change shape at will it seems that they have restrictions on how differnt they can become. Their mass is always a constant and the changed form usually still holds quite a bit of the human like features.