Zoos have used water moats to confine chimpanzees, gorillas or orangutans. When apes ventured into deep water, they often drowned, which indicated that apes could not learn to swim and so prefer to stay on dry land.
Zoos have used water moats to confine chimpanzees, gorillas or orangutans. When apes ventured into deep water, they often drowned, which indicated that apes could not learn to swim and so prefer to stay on dry land.