Yes, it does. As long as you position the motion sensor so it can detect other creatures, it will detect and deter them. We know it works on raccoons, squirrels, skunks, opossums, and other mammals as we have tested it.
The key is in the positioning of the device. Make sure the motion sensor is low enough to detect smaller mammals and place it close to where they enter your property. The motion sensor should detect even small mammals and provide that audible (to them only) deterrent.