Includes index.

"Earth's rivers are a home to many creatures that are at risk of dying out--river dolphins, giant otters, birds, fish, and more. These river animals are threatened by global warming and the actions of people. In this important conservation title, readers will learn about river animals on the spectrum of threatened species and see vibrant photos of those animals in the wild. Also included is the story of an extinct river animal, as well as a success story and advice for young readers on how they can help protect animals for extinction. Colorful maps, charts, and sidebars help make this book a well-rounded learning experience"--,Provided by publisher.