Caption:
House sparrow, Passer domesticus, and dark-eyed junco, Junco hyemalis. English sparrow, male 1, female 2, and snow-bird, male 3, female 4. Chromolithograph after an ornithological illustration by John James Audubon from Benjamin Harry Warrens Report on the Birds of Pennsylvania, E.K. Mayers, Harrisburg, 1890.