Butterflies 16 Month 2012 Calendar. Butterflies are one of the most colourful, fragile yet enchanting insects on the planet today. As every child discovers in the hit children’s book "The Hungry Caterpillar" Butterflies have an unusual life cycle in that they begin life as a caterpillar, then enter a stage of inactive pupa which ends in a spectacular metamorphosis when the cocooned caterpillar becomes the familiar and colourful Butterfly. This calendar showcases some of the most colourful and intricately detailed butterflies in the world today and makes an excellent gift for anyone who admires the beauty of these popular and graceful insects.