Bats equipped with echo location would appear to have the advantage when trying to evade the jaws of cave snakes. Despite being quite literally in the dark, the snake does have one secret weapon however, and that is it's ability to sense each bat flying past through the use of heat receptors. Taken From Planet Earth Series 1 Subscribe to the BBC Earth YouTube channel: www.youtube.com/subscription_center?add_user=BBCEarth Want to share your views with the team behind BBC Earth and win prizes? Join our fan panel here: tinyurl.com/YouTube-BBCEarth-FanPanel BBC Earth Facebook www.facebook.com/bbcearth BBC Earth Twitter www.twitter.com/bbcearth BBC Earth Instagram www.instagram.com/bbcearth/?hl=en Visit www.bbc.com/earth/world for all the latest animal news and wildlife videos This is a channel from BBC Worldwide who help fund new BBC programmes.