Dominic Favre / Keystone
Cows fight during the "Combats des Reines" (Battle of the Queens), an annual event held in the western Alpine canton of Valais, in Aproz, Switzerland on Sunday. The Valais is home to a unique breed of cows, the Herens, also called Eringer cows. Members of this bovine family fight amongst themselves to establish a hierarchy within the herd. During the combat the cows simply push, forehead against forehead.