Bird bath Water Wiggler moves bird bath water to attract birds. Set Water Wiggler in a bird bath and the water wiggler simulates running rippling water. This Water Wiggler unique agitator action creates continuous ripples in the water, preventing mosquitoes from laying eggs. It helps prevent the spread of west Nile virus by eliminating stagnant water in birdbaths. It is easy to install! Just place and go! No wiring, no plumbing. This bird bath accessory has a long battery life; operates on two D-cell batteries (not included), and operates 24 hours a day. It may also be used with heated birdbaths in winter to agitate the water and attract more birds. Bird bath shown not included. See our Bird baths that are sold separately.