gestation period for a Javan rhino
Reproduction. The female Javan rhinoceros reaches sexual maturity at three to four years of age, while males reach maturity after six years. The gestation period is sixteen months, and the interval between births is four to five years. One rhinoceros is born at a time.A young rhino will be active shortly after birth, and will be suckled by its mother for one to two years. Thirty-five to forty years is the average lifespan of Javan rhinoceroses.n average adult Javan rhinoceros is approximately 11 to 12 feet in length, with a height of 5 to 6 feet to the top of its shoulders. There is little sexual dimorphism.