The Art Hammer Wetlands is the largest ACRES preserve. It has a variety of habitats: swamp forest with cottonwood and sycamore trees, upland forest with oaks and hickories, a small lake, portions of the Elkhart River and areas of low wetlands. Birds and wildflowers are diverse. Wood ducks, mallards, other ducks and coots are seen on the water. Woodland birds fly among the trees, and great blue and green herons walk along the shores. Cardinal flowers, marsh marigolds, blue flag iris and marsh mallow are a few of the flowers that bloom here.