A Curious Sight

I am endlessly fascinated by the parade of birds that visit baths, by which ones are used (high or low), and for what purposes.  And I get terribly excited when I see something new.  Today, that was finding this photo of goldfinches---that I don't remember seeing at a bath---and at the ground level one.  Goldfinches always seem to prefer altitude when feeding, and yet this pair chose the other option.  But little will be answered today.  Did they stop only for a drink? and why now? There's just not enough data to see behavior clearly.  But what a sight!