Which species should be exhibited in zoos involves ethical trade-offs between conservation value, welfare provision capability and public engagement that deserve systematic evaluation.
Ethical zoo species selection requires honest evaluation of whether each species' welfare can be genuinely met in the available facility, whether captivity serves meaningful conservation goals, and whether alternatives to captive exhibits might serve public engagement goals without welfare costs. Some species are appropriate captive subjects because their needs are manageable and conservation benefit is real. Others impose irresolvable welfare costs that cannot be justified by the conservation or educational benefits of their display. Zoos willing to make these difficult decisions — including phasing out some species — demonstrate genuine welfare commitment.