OK, this is weird: To ward off bats, these moths rub their genitals 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 The moment she takes off and starts flying around their house @skylerstelz shared that despite butterflies having a very short lifespan, she was determined to see this butterfly fly again! Understanding Why Guinea Pigs Vibrate How Butterflies Work HowStuffWorks 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