The constantly changing ecosystems of salt and freshwater wetlands support an amazing variety of wildlife species. Children will be intrigued by the fascinating animals, such as alligators and hippopotamuses, that depend on wetlands and the ways in which wetland plants and animals depend upon one another. This book also investigates: - different types of wetland habitats, including swamps, salt marshes, and flood plains - the many plants and animals that make their home in wetlands - dangers to wetlands and threats to their wildlife - the function of wetlands in relation to other ecosystems