Females reach breeding age at five years and bear their first calves at between six and eight. Single calves are born at intervals of about three years. Males can breed at nine years old but due to competition from older males, many don't mate until they are about ten years old. Greater one-horned Asian rhinoceroses generally travel alone, feeding under the dense cover of tall grass or trees, and spending hours wallowing in mud, an activity that keeps biting flies at bay. Females and their young travel together, and sometimes a few rhinoceroses will share the same feeding or wallowing areas.
Males are territorial.
Today, the biggest problems are that very little prime habitat remains and poachers shoot the animals for their horns and other parts, which are used in Traditional Chinese Medicine. In recent years, the greater one-horned Asian rhinoceros population has been growing slowly, thanks to habitat and protection programs in places like Nepal's Royal Chitwan National Park. At the top of the forest food chain, this mighty, endangered cat slinks through the shadows in some of the parks where greater one-horned Asian rhinoceroses live. These giants share some of the same habitat. Tamed elephants carry tourists close to wild rhinoceroses, which are not panicked by the pachyderms' presence.