Fantastic facts about butterflies: Everything you need to know, according to science BBC Science Focus Magazine Butterflies vibrate wings to warm up in cold weather Butterflies' 'secret' to keeping cool hidden in wings Research News Monarch butterfly opening flapping wings [Slow motion] Why do moths vibrate their wings? 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