Zoos claim conservation as a primary justification for captivity, but the evidence for significant conservation impact is mixed, and conservation goals must be weighed against individual animal welfare costs.
The conservation justification for keeping wild animals in captivity requires scrutiny proportionate to the welfare costs involved. For species at immediate extinction risk with no viable wild habitat, captive breeding may genuinely preserve species that would otherwise be lost. For the majority of zoo animals, including common African mammals kept primarily for visitor appeal, the conservation justification is much weaker. Individual animals placed in conditions that cause chronic stress or prevent expression of natural behaviour bear a welfare cost that requires genuine conservation benefit to justify. Zoos that devote significant resources to in-situ field conservation and demonstrated public behaviour change make a stronger case for their ethical standing.