The wetlands in the Chesapeake Bay watershed are some of the richest, most productive ecosystems in the world. They may be fresh-water, brackish, or salty and are the home and the breeding grounds of extensive numbers of our most important Bay fishes, reptiles, amphibians, bird, and mammals. The wetlands filter the water entering the Bay, removing the excess nutrients we put on our lawns, gardens, and farms. They also help slow the erosion of the land and filter out silt from run-off. Many of these plants were used for food and medicine. If you look carefully, you may see several types of frogs and painted and snapping turtles along the trail. Also, watch for the many types of dragonflies that live around the pond, also a food source for ducks.