Yak are herd animals who spend the majority of their time grazing on mountain plains, eating grass, herbs, and wildflowers. Yaks live at the highest altitude of any mammal and have firm, dense horns which they use to break through snow in order to get plans buried underneath. In the winter, yak can survive temperatures as low as -40 degrees! Unlike other cattle, yaks grunt instead of the typical “mooing” like other cattle.