Opossums and raccoons are highly adaptable nocturnal mammals that frequently seek shelter in residential spaces. While opossums are generally non-aggressive scavengers, raccoons are highly intelligent and destructive, often tearing through roofing or insulation to create dens. Both species carry significant health risks, including rabies, roundworm, and leptospirosis, and can introduce fleas or ticks into your home environment. Understanding their behavior is the first step in effective management and prevention.