Birds need water for drinking and bathing. Water is particularly important during the winter when natural supplies may be frozen and in dry or hot weather during the summer when water can be hard to find.
Please clean your birdbath regularly and change the water. A layer of algae, dead leaves or bird droppings will soon build up, so give the bath a thorough clean every week. Scrub the sides and bottom of your bird bath to remove algae and other dirt.