Do you enjoy watching birds in the winter? If so, you may want to consider a heated bird bath. Do you think it's necessary to spend money on those things? Do they serve a purpose? It may be challenging to provide water for wild birds during the winter, so yes, they are worthwhile to purchase. When temperatures drop below 32 degrees Fahrenheit, water freezes, turning bird baths into sheets of ice. Though it will take some time, daily maintenance of breaking up the ice and replenishing the bath will keep your birds content.