Doing the Fandango.
Grooming after a enthusiastic bath.
Black-and-white Warblers have an extra-long hind claw and heavier legs than other wood-warblers, which help them hold onto and move around on bark.
source -Cornell Lab of Ornithology
(Fandango is a lively partner dance originating in Portugal and Spain, usually in triple meter, traditionally accompanied by guitars, castanets)
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