Signs you have a possum
Often people hear noises coming from the roof and they are not sure whether it is a rat or a possum up there. Both being nocturnal animals, the disturbance from their activity is usually noticed at night time. And if scratching and gnawing are characteristic for both the rodent and the marsupial, you can still distinguish them by the level and type of noise they make. Heavy thumping noises and loud scratching are usually signs for possums playing up in your attic.
Another clue that possums have moved into your property is the pungent smell their urine leaves behind. Also, you may notice yellow stains appearing on your ceiling, again from their urine, which has heavily permeated through the attic floor. Outdoors, possums can also leave a noticeable trail of significant damage, be it destroyed vegetable and flower beds or broken branches. And you should note that it is not uncommon for both types of creatures to cohabit in your roof space.