Alligators, crocodiles, and lizards are all amazing animals, and they are also all reptiles. Why are these cool creatures classified as reptiles and not amphibians, fish, or birds? Readers find the answer as they learn fascinating facts about what makes reptiles unique. The engaging main text is enhanced by eye-catching fact boxes and vibrant, full-color photographs of reptiles in their natural habitats. Readers also obtain information from helpful graphic organizers, including accessible diagrams. As readers explore a variety of valuable science curriculum topics and scientific skills, they are introduced to some of the most exotic reptiles on Earth.