When winterizing the yard, remember backyard birds. You can safeguard their winter water source by adding a black plastic trash bag to the base of your bird bath. The black material absorbs solar heat, keeping the water in a liquid state longer. Next up, drop a tennis ball into the water basin. As the ball floats on the water, it will break up ice as it forms so that your winged neighbors can swoop in for a refreshing drink even as temperatures dip.