I lived in West Africa for a while and I've got to say that one of the threats to endangered species over there is actually misplaced philanthropy. It's a difficult situation, because often what happens is that there is a drought or some other kind of disaster and the people who live there want to continue living there.
Other countries don't want them to starve so they get all kinds of food and water aid as well as medical aid, so they can continue to live on land that has also suffered from the disaster. And they end up putting too much pressure on the land to the point where it can't recover. I mean, if the people in the area are desperate for food and water they will also be competing with any endangered mammals or other species they live near. And people will generally win most competitions for survival.
So you end up ruining the ecosystem permanently. And that means not only that animals go extinct, but that people end up trapped in a cycle where they can no longer live without aid from others.