The Javan Spotted Deer is a deer native to the islands of Indonesia and East Timor. Introduced populations exist in a wide variety of locations in the Southern Hemisphere. As they have become endangered the Ayung Resort has started a breeding program.
The deer are active mostly in the early morning and late afternoon. They are rarely seen in the open and are very difficult to approach due to their keen senses and cautious instincts.
The species is very sociable, and individuals are rarely found alone. When alarmed, a deer stag lets out an extremely loud honk. This is an alarm call and alerts any other deer in the vicinity.
As with other deer species, Javan Spotted Deer mainly feed on grass, leaves, and fallen fruit. They do not drink water, deriving all required fluid from their food.
The main predators of the species include the Javan leopard, the dhole, crocodiles, pythons, and the Komodo dragon.
The Javan Spotted Deer mates around July and August, when stags contest by calling in a loud, shrill bark and duelling with the antlers. The doe gives birth to one or two calves after a gestation period of 8 months, at the start of spring. Calves are weaned at 6–8 months, and sexual maturity is attained at 3–5 years, depending on habitat conditions. Javan spotted deers live 15–20 years both in the wild and in captivity.