How are animals able to speak to one another? What do different animal sounds mean? Read this book to find out! Readers will travel around the world to meet howling wolves, colorful chameleons, and bellowing hippos. Students will learn about the many ways animals communicate, including pheromones, scent, ultrasonic calls, song, vibrations, and more. Stunning photography introduces individual animals, and a handy glossary helps to expand readers' vocabulary. For more information on the daily lives of animals, check out other titles in the Animals at Work series!