Swales are the low wet areas between the dunes. They have their own succession of plant communities, with rushes, sedges, and marsh grasses as their pioneers. Dwarf birch and Red Osier Dogwood grow in more mature swales, followed by willows and cottonwoods and ultimately these swales will support Black Oaks. These wetlands are home to a variety of plants including sundew, many orchid species, and Kalm's St. John's-wort. Several species of frogs can be found in these areas, as well as birds, reptiles, and aquatic insects such as dragonflies.

 

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