Tiger Swallowtail Butterflies Puddling At Forks of Creek YouTube Why you get butterflies in your stomach, and how to calm them Calm Blog 5 Basic Butterfly Behaviors to Know Birds and Blooms moths do not shiver because they are frightened, but because they have muscles that need to be warmed up before flight. the shivering helps to regulate their temperature and ensures their wing 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!