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 What causes shaking in monarch butterflies? The Wild Online Journalism Awards Vibrations in the Breast: Should I Worry? I found a butterfly but it won't fly. It's not dead because it moves but it won't fly. What do I do? : r Butterflies So Ive never seen this shaking before. This male is about 4 hours after eclose. Was walking on the ceiling and flapping wings normally. , Flew onto leg and shook a while. Later flew off and onto