How To Scare Possums Away. A good way to keep them out is to mince or crush garlic in the area they often enter to effectively scare them away. Also, make sure that the entrance to the hiding place is flooded with light.
And once these devices activate, they will scare the crap out of that opossum invader. Be sure to release the possum several miles away from your property to avoid it returning;
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Both will help keep the possums away, though. But as far as trying to get an “owl statue to scare off possums” then i think you may be waiting for a long time.