The white rhino was hunted for sport in the 1800s. It was so popular, it almost went extinct in less than 75 years. Luckily, in 1885, twenty of them were discovered in Kwazulu-Natal, and a rescue breeding program was started. Since then over 20,000 rhinos have been bred and returned to the wild.
Most all of these animals have been saved through this same type of captive breeding program where mature breeding pairs are protected and fed until sufficient numbers are reached and some of them can be put back in their natural habitat.
It is wonderful that these problems were recognized and action was taken in time to save all these animals. I hope that more endangered species will be able to be removed from this list in the future.