Why do monarch butterflies shiver? They do this to increase their body temperature by warming their muscles so they can take flight., Photo Courtesy of Community Member Julie Bthanks Julie! The Butterfly Effect Is Why It's Impossible to Predict the Weather Discovery Vanity FLUTTER BY license plate Bird Butterfly Wings Vibrate Nervous Excited Car eBay Ever notice a monarch butterfly vibrating its wings? This isnt just random behaviorits a survival strategy called Shivering. Especially when temperatures drop, monarchs vibrate their wings to Bionic butterfly wings are ultimate heat sensors New Scientist