UnDisciplined: over 20 percent of reptiles are threatened with extinction

There's bad news and good news about the reptiles that live on our planet. The bad news is that over 20%, one out of five, of those species are now under threat. The good news is that conservation efforts for birds, mammals and amphibians are unexpectedly good surrogates for the conservation of reptiles.

Bruce Young is Chief Zoologist & Senior Conservation Scientist at NatureServe.