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 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 Butterflies vibrate their wings for an array of reasons: to regulate their temperature, to ward off predators, or to strengthen their wings. We learn so much about our environment when critters come 5 Basic Butterfly Behaviors to Know Birds and Blooms Vibrations in the Breast: Should I Worry? 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