A rhinoceros is a powerful beast weighing 3 tons or more and wielding a deadly horn up to five feet long. Ruthlessly slaughtered for centuries, rhinos are suddenly one of conservation's great success stories as populations of white rhinos and black rhinos recover. Even so, rhinos are still at risk: Javan and Sumatran rhinos are close to extinction and the world rhino population is still less than it was just thirty years ago. This book profiles the people and the organisations around the world who are helping rhinos to survive, and surveys the biological issues in and challenges of preserving a future for endangered wildlife. The Firefly Animal Rescue series promotes endangered and threatened species and what is being done to protect them. Each book introduces readers to a featured animal, explains the threats it is facing, and explores efforts by conservationists and organisations to protect it.