About Monarch Butterflies Ever notice a monarch butterfly vibrating its wings? This isn't just random behaviorit's a survival strategy called Shivering. Especially when temperatures drop, m the_monarch_movement Facebook It's only the low vibration, uncouth bugs like flies and wasps that try to enter your house unannounced : r BlackPeopleTwitter 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!