Aurochs or Urus (Bos primigenius), was a very large type of cattle that was originally prevalent in Europe. Studies indicate that Aurochs evolved in India more than 2 million years ago, migrated into the Middle East and further into Asia, and then reached Europe around 250,000 years ago. They are now extinct.

Aurochs were wild cattle and much larger than domesticated cattle. Aurochs reach a height of about 6 feet at the shoulder. Aurochs also had many features that are rarely seen in modern domestic cattle, such as lyre-shaped horns set at a forward angle, a pale stripe down the spine, and sexual dimorphism of coat color. Males were black, and females and calves reddish. They were also known to have very aggressive temperaments and killing one was seen as a great act of courage in ancient cultures.