A male Yellow Warbler in full breeding colour, set on a willow stem in the restrained palette of John James Audubon’s Birds of America: warm cream ground, soft olive leaves, the bird’s clean lemon-gold lit from the side.

Setophaga petechia is the small flame of damp willow edges and streamside thickets. He is all yellow and motion, gone before most people fix him in the binoculars. Here he holds still.