Watch | The moment when a rhino is born

A rare Sumatran rhinoceros was born in Indonesia on May 12 giving renewed hope to environmentalists struggling to protect the critically endangered animal. The female calf is 15-year-old Ratu's second with her mating partner Andalas. Sumatran rhinos are the smallest in the world. Indonesia's Ministry of Forestry and Environment has said that less than 100 Sumatran rhinos, are left in the wild.