Extinction is the terrible and unfortunate end to a species life. Famous examples of extinct animals are the woolly mammoth, and the saber tooth tiger. But technically speaking, hundreds of species of animals go extinct every 24 hours, and that is an extraordinarily sad statistic. Reasons for extinction include removal of habitat, over-hunting, and plenty more, but the root of the problem is the human race. Here are 20 final photos of animals before they went extinct.