Transfer to Other Zoos
This is the most common option. Zoos coordinate transfers to place animals in suitable environments with proper care, sometimes under formal agreements.
Release Into the Wild
This is less common because suitable release locations and survival are difficult to ensure. It may be best for endangered or displaced species.
Euthanasia
This is the least desirable option and results in the animal's death. It may be necessary when animals suffer from serious illness or injury or when no other option exists.
Zoos carefully consider all options to find the best solution for the animals involved.
Examples
In 2019, the Cincinnati Zoo transferred hippos Fiona and Bibi to the Toledo Zoo due to space constraints. In 2018, the San Diego Zoo released condors from a captive breeding program into the wild. In 2017, the Los Angeles Zoo euthanized a giraffe named Caesar suffering from a terminal illness.