aurochs also had several features not often seen in modern cattle, such as lyre-shaped horns set at a forward angle, a pale stripe down the spine, and different color according to the gender. males were black with a pale stripe down the spine, while females and calves were reddish (these colours are still found in a few domesticated cattle breeds, such as jersey cattle). aurochs were also known to have very aggressive behaviour, and killing one was seen as an act of courage in ancient cultures.