Book excerpt: What is a butterfly's life? It's full of twists and turns as butterfly glide on air currents. It's full of dips and dives as they show off for their mates. There are more than 17,000 kinds of butterflies in the world. Some of them will only live for a few days. Others will migrate thousands of miles to winterin a warmer climate. Still others will hibernate through the cold months. For all butterflies, life begins with etamorphosis. In one of nature's most amazing feats, caterpillars become creatures of beauty and grace.Filled with winsome illustrations and a delightful design that looks like an artist's sketchbook, this is an inspiring companion to "It's a Hummingbird's Life".