People always make jokes about rabbits and their knack for copious procreation, but don't kid yourself: even energetic bunnies cannot produce offspring indefinitely when they are overhunted or their habitats are destroyed. As it turns out, about 30 percent of rabbit species [nine out of 30] are among the most endangered on Earth, according to Andrew Smith, a conservation biologist at Arizona State University in Tempe.

Look at the slide show and acquaint yourself with a few of them... you may never take a bunny for granted again.