Abstract: Featured is a device particularly suitable for heating water in a container, such as a pail or bird bath, so as to maintain a source of drinking water for domesticated animals, wild animals and livestock. A water heating device according to the present invention includes a housing, a heat generating mechanism that is disposed within the housing and electrically coupled to a portable power supply and a mechanism that thermally couples the heat generating mechanism and the housing so that at least some of the generated heat energy is coupled to the housing. The housing is configured and arranged so as to be immersible in water and so that at least a portion of the heat energy being thermally coupled to the housing is dispersed or transmitted to the water. Also, the heat generating mechanism is configured and arranged so the heat energy being dispersed or transmitted to the fluid is sufficient to maintain a liquid supply of a least a portion of the water within the container for a predetermined time.

Abstract: The bird watering device utilizes solar energy to maintain drinking water in an unfrozen state even in freezing temperatures. Water is held in a shallow tray which fits within an enclosing dish with a substantial closed airspace between the tray and the dish to provide an insulating effect. A cover fits over the disk and tray, the cover being apertured to permit a bird access to water held in the tray. A rim extends downwardly from the aperture to substantially obstruct air circulation of air in the space between the cover and water held in the tray.