The birdbath comprises a body (1) adapted to float on water, for example in a pond. The birdbath is designed to become unstable if a heavy bird or other animal attempts to stand on it thereby protecting small birds bathing in the birdbath. The body (1) has holes (6) through which water can flow from the pond to maintain the level of water in the birdbath, and a heater (9) operable to prevent water in the birdbath and also water in the pond beneath the birdbath from freezing. The invention is also applicable to articles designed to provide drinking or/and feeding facilities or/and shelter or protection for birds or amphibians.