There also are naturally occuring birdbaths, such as hollowed-out tree stumps that collect rainwater. Any watering station should be strategically placed so that predators cannot sneak up on unsuspecting bathers. Nearby brushy cover offers protection as well as perches for birds to preen. But low shrubbery too close to a birdbath can be a perfect ambush spot for a neighborhood cat. In general, the lower the birdbath, the more open space needed around it.
Birds prefer baths with textured bottoms that provide firm footing.
Cover smooth surfaces with pebbles or sand. The size of a birdbath is not critical, but those less than a foot in diameter probably will be used just for drinking. Commercial birdbaths are available in materials ranging from concrete, to terra-cotta to plastic. Concrete models are expensive and heavy to handle, but they provide excellent footing and will not budge in severe weather. A plastic birdbath may need its footing altered and its placement secured against strong winds.