the conservancy's long-range master plan for the emiquon project, meanwhile, included restoration of the parcel's natural drainage patterns to the maximum extent possible, including reconstruction of a free-flowing connection between the illinois river and thompson lake. as of 2008, the refilled lakes were stocked with more than 30 species of fish, including largemouth bass, bluegill, bullhead, channel catfish, crappie, and sunfish. several dozen fish-eating black-crowned night herons had also arrived.