Some animals live in fresh water, and some in salt water. This book introduces both kinds of habitats but focuses on freshwater rivers, lakes, ponds, and wetlands. Children will be fascinated by pictures of baby hippos, geese, swans, alligators, tigers, muskrats, nutrias, river otters, and more. They will learn about the life cycle of frogs and dragonflies in ponds. Photosynthesis and food chains are also explained with diagrams using photos of plants and animals.