Though the exact reasons for this magnificent creature's demise aren't entirely clear (though over-hunting has been speculated), it got me thinking about other animals, while perhaps not as majestic in size, which we could push into oblivion.
The highest category on the scale of being threatened with extinction is critically endangered. According to the IUCN this means that the species' population numbers have decreased, or will decrease, by 80% within three generations. It's the last stop before be listed as extinct in the wild. The animals in this slideshow are just a small fraction of the species which may vanish forever over the course of your life:
Obama Administration Adds Rare Hawaiian Vine to Endangered Species List
10 Endangered Animals Which Aren't in the Spotlight But Should Be (Slideshow)
Animal Planet Endangered Species Guide