Image from: Swainson, William 1821. Zoological illustrations, or original figures and descriptions of new, rare, or interesting animals, selected chiefly from the classes of ornithology, entomology, and conchology, and arranged on the principles of Cuvier and other modern zoologists. London, Baldwin, Cradock, and Joy & W. Wood. 1: pls. 19-66 + text; pl. 34