Are Ultrasonic Devices Effective for Raccoon Deterrence? Before examining the efficacy of these devices it is important to know the behavior of raccoons. The nocturnal animals are clever, extremely curious, interesting, and flexible. In areas with urbanization, such as Houston, raccoons are known to look through garbage cans and attics, seeking shelter and search for sources of food around houses. The ability of raccoons to climb up and squeeze into tight spaces and manipulate things with their claws make them extremely dangerous nuisance. Visit here:- https://theglobalnewz.com/are-ultrasonic-devices-effective-for-raccoon-deterrence/