hawks, owls and crows are puzzle breakers you would be amazed, in your live trap put something irresistible like an egg or molasses covered dog food, or even some canned cat food still in the can, if it happens to be a skunk in the trap simply throw a blanket over the trap and it will calm down...
any tracks, could be anything from a rat to raccoon, a live trap for raccoon size would probably do on this occasion provided the holes are small and you set it light