Why Can't We Hear the Sound of Butterflies Flapping Their Wings? by Miraculous Medium Tiger Swallowtail Butterflies Puddling At Forks of Creek YouTube Understanding Vibration Plates and Nervous System Health Love is in the air: how butterflies date Natural History Museum All About Butterflies Cambridge Butterfly Conservatory 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!