Take your pick of suggested prep, with attached paper and websites on Rewilding:

General concepts http://dx.doi.org/10.1016/j.tree.2016.02.017 4)

Theoretical approaches https://doi.org/10.1098/rstb.2017.0434

Cool paper on tortoises and islands  https://doi/full/10.1098/rstb.2017.0442

Mammoths….. https://doi:10.2307/3873461

Welfare and captive elephants https://animalstudiesrepository.org/animsent/vol5/iss28/1/

and others in response to this paper….

Any other examples you want to pursue – there are MILLIONS out there.

P.Lee