Abstract: A self-cleaning bird bath having a vertical support stand and a shallow double walled bowl pivoted to the upper end thereof so as to be movable from a horizontal position to a substantially vertical position. A piston and cylinder assembly in said vertical support stand with the piston engaging the shallow bowl for tilting the same, a flexible conduit connecting the interior of the hollow bowl with the interior of the cylinder and a second tubular member for supplying water to the cylinder so as to move the piston and fill the shallow bowl by way of apertures in one of the double walls thereof whereby the amount of water delivered to the cylinder will tilt the shallow bowl and/or fill the same.