The Butterfly Effect Is Why It's Impossible to Predict the Weather Discovery 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! 10 Things You May Not Know about Butterflies Nature for my Soul How do butterflies fly? Australian Butterfly Sanctuary Physical and behavioral adaptations to prevent overheating of the living wings of butterflies Nature Communications How Butterflies Work HowStuffWorks