protective custody

In ecology, "protective custody" refers to the practice of bringing species that are critically endangered and may not survive in the wild into a controlled environment for their protection and eventual reintroduction. This can involve housing them in zoos or botanic gardens, or storing seeds from rare plants.1

This approach is a conservation tool used when the threats to a species in its natural habitat are too severe or not fully understood. For example, the California condor was brought into captivity due to threats like poisoning and habitat loss, allowing for a successful captive-breeding program before reintroduction efforts began.1

Biosphere reserves, designated by UNESCO, are also related to conservation, serving as learning sites for sustainable development where human-environment interactions are studied and managed to conserve biodiversity. However, "protective custody" in a general sense, as defined by Merriam-Webster, refers to a safe place under police watch.23