I'm 99.9% sure that i remember reading on here a while back that someone said that all spider morphs do also have the head wobble. Let me do a quick search and I'll get back to you. I have a spider as well, and the only time I notice it is when she's getting ready to strike, her head sways a bit, and when you flip her over on her back, she doesn't seem to right herself as fast as all of my other BP's. Other than that she's practically perfect in every way!