The least we can do now is share what's left with those nonhuman life-forms that we have not yet managed to exterminate. In some instances I believe we have done too much. For example, the reintroduction of wolves was a selfish move by us humans because we knew that we were bringing them into hostile environments. We wanted to see them for our own enjoyment, forgetting that all they want is to be left alone. I find the very question offensive.
All species have the inherent right to exist.
We need to stop acting like lords of the earth and begin acting like members. The complete and total immorality of ending evolution as the world has known it for 3 billion years requires that we do everything we can. Nevada Well, if we had done enough, they wouldn't be endangered.