Animals like elephants, black rhinos and eland can potentially convey the seeds over long distances. His investment in Nepal also included conservation efforts for rhinos and tigers. Player then invented his famed rhino catching technique to relocate and save the white rhinos. The thriving population lived by hunting game such as horses, bison, mammoth and woolly rhinos. The 1,000 large animals included 512 big game animals, including six rare white rhinos. Indian rhinos were hunted relentlessly and persistently. In 2013, poaching rates for white rhinos nearly doubled from the previous year. The last rhinos in the Americas became extinct during the Pliocene. About 275 Sumatran rhinos are believed to remain. The disease is also found in wild rhinos. The only two northern white rhinos left are maintained under 24-hour armed guard in Kenya. A slight genetic difference is noted between the Western Sumatran and Bornean rhinos. Now only Java contains the last Javan rhinos. Horses and modern rhinos came onto the scene. Like other rhinos, adults did not have incisors.