I realize this has nothing to do with iconography, but I am convinced that demons can and do take many images before men. The Apostle Paul wrote that the Devil can appear as an angel of light. And so I think he has - even in modern times when it has suited his purpose.
Today, I think demons are seen of men; not as mideval gargoyle like creatures, but most often as ordinary "men" and also as apparitions including UFOs, Space Aliens, Bigfoot/Yetti, etc. in order to mislead real men through meaningless controversies and to divert men from believing the Gospel unto the salvation of their souls.
My 2¢ worth anyway,
μιχαηλ της συστρατιωτης