While the banteng (Bos javanicus) may be active during the night or day, in areas with heavy human encroachment the herds have become nocturnal. Herds have been recorded feeding throughout the night, pausing to rest and ruminate at intervals. These wild cattle are very shy and retiring, and due to their wariness they are hard to approach. Feeding in open clearings, banteng depend on dense thickets in which to retire for shelter and safety. During the wet seasons, banteng may leave the valleys to forage, heading for forests at higher elevations. As the dry season takes hold, they return to the opener lowlands.