Place the heron deterrent near the pond and you should see an end of this predator. Dimensions: 8″ x 5.5″ x 30″ Tall The popular Blue Heron Decoy helps to keep Herons away from your pond by using the herons territorialness against them. Place the heron deterrent near the pond and you should see an end of this predator. Great protection at a affordable price. Bear in mind that the Blue Heron decoy may actually attract the birds during the mating season so it may be best to remove the decoy at this time of year. This heron deterrent can be used in conjunction with our other products, if desired, to increase the chances of protecting your fish should a heron land by your pond.