The Metropolitan Water Reclamation District owns this low flat area where water levels vary throughout the season. While waterfowl gather when water levels are high, shorebirds concentrate on the exposed mudflats that make this spot so important to local birders. In addition to the many common species that regularly appear, such rarities as Marbled Godwit, Red Knot and Long-billed Dowitcher have also been observed in recent years. The marshy borders also have been home to such nest.