Mozzarella is traditionally made with the milk of which animal?

Mozzarella is a southern Italian cheese traditionally made from Italian buffalo's milk by the pasta filata method. Fresh mozzarella is generally white but when seasoned it turns to a light yellow depending on the animal's diet. Due to its high moisture content, it is traditionally served the day after it is made but can be kept in brine for up to a week or longer when sold in vacuum-sealed packages.

Source: Wikipedia