Why Can't We Hear the Sound of Butterflies Flapping Their Wings? by Miraculous Medium 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 Monarch Butterfly Garden Facebook Q: Why are my butterfly's wings shaking? ANSWER: All insects are coldblooded unlike birds and mammals that maintain a constant high temperature. A butterfly vibrates its wings to increase the metabolic What causes shaking in monarch butterflies? How Butterflies Work HowStuffWorks How Flashy Wings, UV Light, and Seasons All Play a Role in One Butterfly Species' Mating Rituals