Heat Sensing Pit Vipers | Deadly Vipers | BBC Earth

Learn more about the amazing way in which a pit viper uses all its senses to hunt for prey at night. Fascinating short video from BBC animal show 'Deadly Vipers'. Visit http://www.bbcearth.com for all the latest animal news and wildlife videos and watch more high quality videos on the new BBC Earth YouTube channel here: http://www.youtube.com/bbcearth