Starlings Bath in Hot Tub

The heater for the bird bath has worked hard during today's winter storm. The mockingbird (first photo) comes to the Habitat only to drink; he never visits the feeders.
The starlings come several times a day to bath (second photo), something that the other birds just do not do. The heater keeps the water just above freezing, but the starling play as if it was a hot tub.