Watch: Photographing 12,000 Animals Is Hard Work

Think taking pictures of your pet is hard? Try an armadillo or a full-grown tiger. It's all in a day's work for photographer Joel Sartore, who's on a mission to create portraits of the world’s 12,000 captive species before they disappear. Sartore must wrangle the unruly, distract the curious, and clean up all the unexpected messes that come with photographing wild animals.