Butterfly facts Insects & Arachnids BBC Earth BBC Earth Ever notice a monarch butterfly vibrating its wings? This isn't just random behaviorit's a survival strategy called Shivering. Especially when temperatures drop, monarchs vibrate their wings to generate heat and warm Did you know Monarch butterflies shiver their wings to stay warm? When temperatures drop, these delicate pollinators vibrate their wings rapidly in a behavior called shivering. This tiny motion generates heat, helping Can a Butterfly in Brazil Really Cause a Tornado in Texas? Live Science UC Davis Research: How Loss of Migration Affects Monarch Butterfly Wings Entomology & Nematology News How Butterflies Work HowStuffWorks