Aurochs

The aurochs (pl. aurochs, or rarely aurochsen, aurochses), also known as urus or ure (Bos primigenius), is an extinct species of large wild cattle that inhabited Europe, Asia, and North Africa. It is the ancestor of domestic cattle; it has also been suggested as an ancestor genetically to the modern European bison, which have been crossbred with steppe bison. The species survived in Europe until 1627, when the last recorded aurochs died in the Jaktorów Forest, Poland. -Wikipedia-

The aurochs (also Urochse), Ur or Urus (Bos primigenius) is a species of cattle that has become extinct in its wild form. According to recent genetic research, Near Eastern populations are considered to be the ancestral form of the taurine domestic cattle, which is thus a domesticated form of the Eurasian aurochs. The Indian zebu is descended from the Indian subspecies of Urs, which has also been listed by some authors as a separate species, Bos namadicus. The presumably last specimen of the formerly widespread wild form of the bovine died in 1627. - Wikipedia -

Series list for 100/72/13
No. 100-GU 5 (2x) Aurochs: cow, grazing
No. 100-GU 6 (2x) Aurochs: cow
No. 100-GU 7 (2x) Aurochs: calf
No. 100-GU 1 (2x) Aurochs: bull
No. 100-GU 2 (2x) Aurochs: cow
No. 100-GU 3 (2x) Aurochs: cow
No. 100-GU 4 (2x) Aurochs: cow