The Gaur is the largest living bovine and is native to south and southeast Asia. Here he occupies evergreen forest and moist deciduous forest, particularly hilly terrain. He leads a mostly diurnal lifestyle, but where human disturbance has encroached on his territory he becomes nocturnal in his habits. Herds number up to 11 or so individuals, lead by a matriarchal female and often containing one bull. During breeding season other bulls may hang around, hoping to mate with the cows. The bull's size determines his dominance and serious clashes are rare.