You need to think bigger. There are several ways. Eating all the remaining individuals in a local population of an endangered animal until splitting the species

You need to think bigger. There are several ways. Eating all the remaining individuals in a local population of an endangered animal until splitting the species in two isolated areas unable to survive, would be the obvious one. For example, a professional of ecology would ask him/herself questions like "are the Parvoviruses of asymptomatic ferret pets unable to increase their population size"?