they pretty similar to pacs, they just sit there and lunge, can catch cricket from quite far in comparison to pacman. they move a little, but not much and always at night. i have one smaller, that one moves more. why are you saying it is silly to feed crickets to your pac, it is very entertaining to watch how a very big pac would go for tiny in comparison cricket, I always give mine once in a while to stimulate hunting instincts.