Did you know that a group of geese on land or water is called a gaggle? Or that schools of fish have tactics for evading predators? Learn how and why some of the animal kingdom's most interesting animal groups stick together for survival with this exciting new series! Vivid and engaging full-color photographs and infographics complement the carefully leveled text to make reading for understanding easy and fun. Includes diagrams, sidebars, glossary, table of contents, and index.