Evidence for zoo conservation impact is variable and contested. Understanding what works guides both zoo resource allocation and public advocacy for welfare-justified captivity.
Zoo conservation impact must be honestly assessed to justify the welfare costs of captivity for animals in zoo programs. Where conservation evidence is strong - specific reintroduction successes - the welfare justification is real. Where conservation contribution is weak or absent, higher welfare standards are needed to justify keeping animals captive. Honest assessment guides both facility improvement and species-appropriate decision-making.