The Mysterious World of Jimmy Akins

When were thylacines declared extinct? Because the last captive animal dies doesn't mean that there aren't still others out in the wild. We also need to consider whether it's really possible to bring them back or de-extinct them. Also from the faith perspective, we need to consider the morals of extinction and de-extinction. Is it okay to let animals go extinct? And do we have an obligation to bringing them back?