This lush habitat includes aspen, paper birch, oak, red and sugar maple, basswood and other broadleaf trees. Woodland ferns and variety of wildflowers such as hepatica, yellow lady-slippers, and trillium carpet the forest floor. Green ash, black ash and occasionally American elm are found along sluggish streams, swamp edges and in depressions within the upland hardwoods. The lowland forests are teeming with marsh marigolds in the spring. These forests support ruffed grouse, American woodcock, and more than 25 species of warblers.