A caterpillar starts out life very small, then grows and transforms from a larva into a butterfly or moth. This book uses bright, appealing photographs and simple text to explore caterpillars' unique traits, colorful bodies, distinctive habits, and different habitats in a concise way that is engaging to young readers. Through comparing similarities and differences of various caterpillar species, this book highlights caterpillars' defining features, while showing students how caterpillars change into iconic creatures like the monarch butterfly, the silkworm moth, and the glasswing butterfly.