Birds need water for drinking and for bathing. They need water to keep their feathers in good condition to serve as insulation for those cold winter nights. Seed eaters need to drink plenty of water as their diet is so dry. Other birds, such as blue tits may drink more in the winter because their diet of dry nuts does not provide them with as much water as their summer fare of juicy caterpillars. Bird Baths not only provide an oasis for birds but will also attract all kinds of other wildlife to your garden.