Faunal finds include horse, reindeer, mammoth, cave lion, rhinoceros, bear and aurochs. "Bos indicus", the zebu; and the extinct "Bos primigenius", the aurochs. Most modern breeds of domesticated cattle are believed to have originated from the extinct aurochs. At Lascaux, bison, aurochs and ibex are not represented side by side. The project largely uses hardy cattle breeds with superficial resemblance to the extinct aurochs. Three wild subspecies of aurochs are recognised. It is not to be confused with the aurochs, the extinct ancestor of domestic cattle. Fauna included aurochs, wisent, moose and red deer. The kouprey is believed to be a close relative of the aurochs, gaur, and banteng. A painting by Willem Kalf depicts an aurochs horn. Onagers and "aurochs" were planned to follow. These show relatively slight differences to the Eurasian aurochs ("B. p. primigenius"). The horns of the aurochs had a characteristic and relatively stable shape. The horns of the aurochs were characteristic in size, curvature, and orientation. A 1999 archaeological dig in Peterborough, England, uncovered the skull of an aurochs.