My male has a minor wobble. To my observation, I think that this may be an inner-ear problem that affects balance. He lists his head very slightly to one side, as well as quivering rather violently when stalking prey. He is prone to miss prey when he strikes, but, undaunted, he simply turns right around and grabs it, lol. I have noticed that he will take longer to right himself when his head is inverted.

As others have observed with spiders, he's a very good feeder, and also has an excellent temperment.