This video says about itself:
Bewick’s Wren Takes a Dust Bath
13 July 2016
Taking a bath in the dirt might seem counterproductive, but it is actually an excellent way for birds to remove excess oils from their feathers. Dust baths can also be used to dry up ectoparasites living among the feathers, making them easier for the bird to remove.
Bewick’s wrens live in North America.
Pingback: Wren, skylark dry ‘bathing’ | Dear Kitty. Some blog