EditorialDusky Grouse, Rock Mountain Cow (Dendragapus obscurus, Tetrao obscurus), Signed: J.J. Audubon, J.T. Bowen, lithograph, Pl. 295 (vol. 5), Audubon, John James (drawn); Bowen, J. T. (lith.), 1856, John James Audubon: The birds of America: from drawings ma...