A method for tracking vermin includes causing the vermin to be covered in a non-toxic fluorescent substance which will leave a trail as the rodent enters/exits the human habitation, then examining the habitation with an ultraviolet light to determine the location of the entry/exit point used by the vermin. The fluorescent substance is preferably invisible without the aid of an ultraviolet light. It is also non-toxic to humans as well as animals and is relatively inexpensive. The apparatus for applying the ultraviolet substance is preferably a “bait station” within which an attractive substance is placed and surrounded by the fluorescent substance.