3 pack bundle. Keep your feathered friends happy and healthy this winter with the Bird Bath De Icer Thermostatic Controlled Winter Water Heater. Designed to keep the water in your bird bath from freezing, this heater features easy mounting on the ground and a sleek black color that complements any outdoor décor. With a height of 9.45 inches, this bird bath de-icer is perfect for all types of birds, including chickens and ducks, and requires no assembly. Plus, its unique bird theme adds a charming touch to your backyard oasis. Brand New never used. Free US Shipping.