the Asp does not look like any snake's head that I've ever seen, and in case anyone is wondering, an Asp is a southern European viper which is also often referred to as an Egyptian Cobra. Also the cobra is a bit of a stretch, I'll give you the python does look like a snakes head, and the anaconda is similar enough I suppose, but the diamondbacks are right out my friend, so sorry, and yes a diamondback rattlesnake is also a type of snake, and if you want me to believe that they were modeled after a snakes head, your going to have to show me some pretty strange snake heads.