300
As of November 2015, there are only three animals of this subspecies left. They all belong to the Dvůr Králové Zoo in the Czech Republic but live in the Ol Pejeta Conservancy in Kenya and are protected round-the-clock by armed guards. According to the latest assessment from 2011, the subspecies is considered "Critically Endangered (Possibly Extinct in the Wild)".
What is the northern white rhino?