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 Where do butterflies get their striking colors? HowStuffWorks The beautiful madness of the butterflies' dance Butterflies The Guardian Love is in the air: how butterflies date Natural History Museum Why Can't We Hear the Sound of Butterflies Flapping Their Wings? by Miraculous Medium