Most animals don’t belong in zoos, but hyaenas REALLY don’t belong in zoos. He also reveals that some animals in zoos are born in captivity, but others are captured and brought in. “At times, this is done in the name of conservation, or when a wild animal is very ill. But many zoos will take animals from the wild, or buy animals from unethical animal traders.” "What we should be doing is protecting the habitats of wild animals and ensuring their survival in the wild," argues the Green Eco-Friend site.