This is a vintage illustration of an American bison, likely from a scientific or historical publication. The bison is depicted in profile, standing in a grassy field. It has a massive, muscular build, covered in thick, shaggy fur. The head is large with small, pointed ears and a short, curved horn. The bison's beard and chest are particularly fluffy. The illustration is done in a detailed, cross-hatched style, typical of engravings from the 18th or 19th century. The background consists of simple, stylized grass and foliage. Below the image, there is text identifying the animal as 'Bos Bison' and 'The American Aurochs (Bison)' and the artist as 'J.I. Holzhals of Zurich, 1768'.