Research. If we are to save many wild species and restore and repair ecosystems we need deeply to know about this species animal. Studying animals in zoos where there is less risk and less variables. Knowing say the oestreus cycle of an animal or their breeding rate helps manage wild populations. Things like capturing and moving at-risk or dangerous individuals is bolstered by knowledge in zoos about doses for anaesthetics, and experience at handling and transporting animals. This can make a real difference to conservation efforts and to reduce human-animal conflicts, and collectively provide a knowledge base for helping with the increasing threats of habitat destruction and other problems.