Welcome to the scarecrow sprinkler guide with product description and best prices on motion activated scarecrow sprinkler systems – the humane animal deterrent. If you are looking for the most effective and environmental friendly deer deterrent a motion detection scarecrow is the best choice. Automatic sprinkler systems are easy to set up and will not pollute your garden with chemicals. Watch the video of how a motion activated sprinkler system works. There are also a number of ultrasonic animal deterrents . These pest control systems work through inaudible sound and are motion activated just like the sprinkler systems. If you are bothered by many different kinds of animals, a combination of both systems may be the ticket to garden peace.