Zoos are very sensitive about their images these days. They do not want to be seen as places where animals are locked up against their will. Instead, they are seen as places where endangered species can flourish. They want to reconstruct the natural environments of animals. So there appeared a new kind of zoo.
 Howletts Zoo in Kent is owned by John Aspinall, who is famous for his program of raising endangered animals and returning them to the wilderness. The zoo has the largest gorillas in the world, and it is the zoo's policy to provide a natural environment for the animals. Sometimes this can be dangerous, and some gardeners are injured and one died.