It does not matter what size the bird is, whether it is a golden eagle at The Raptor Center or a black-capped chickadee in a puddle on the side of a road, most birds will take advantage of the opportunity to bathe especially after a long winter.
On one of my frequent trips to White Water State Park I found a small of water that formed from the melting snow. Since the day was warm and sunny several small passerines decided to take advantage of this shallow trickle of water and take an impromptu bath.
Most of the birds bathing were pine siskins, although there was also a bashful dark-eyed junco that flew before I could take his pic. The pine siskin is a northern finch that usually spend their summers up in Canada, although there are populations that stay in the US year round up in the Rocky Mountains. During some winters, like the one that recently ended, the siskins will irrupt southward into the continental US if there is not sufficient food.