A ruddy sheldrake (Casarca rutila). Colour lithograph, ca. 1875. https://www.rawpixel.com/image/13956261/ruddy-sheldrake-casarca-rutila-colour-lithograph-ca-1875Free Image from public domain licenseChesnut-Coloured Shieldrake (Casarca Tadornoides) illustrated by Elizabeth Gould (1804–1841) for John Gould’s… https://www.rawpixel.com/image/321365/free-illustration-image-duck-birds-elizabeth-gouldFree Image from public domain license