Swamps, bogs, marshes, and estuaries--wetlands come in a variety of forms and are vital for many organisms around the world. Peel back the corners of a wetland and find out what lives there, from herons and algae to alligators and jaguars. Learn how these organisms operate in their delicate ecosystems. Discover, too, where in the world wetlands are found and what you can do to help protect these rich, diverse lands.