The Supawna Meadows National Wildlife Refuge on the upper Delaware Bay in Salem County, NJ, is increasingly threatened by a variety of exotic invasive species. The slightly brackish tidal marsh, a unique and important habitat for a variety of wildlife, is being taken over by the invasive plant, common reed (Phragmites australis). This reed forms large, monotypic stands, crowding out native vegetation and decreasing habitat quality for wildlife. Refuge wetlands are also threatened by the invasive plant, purple loosestrife (Lythrum salicaria). Refuge forests are being taken over by the invasive plants Japanese stiltgrass (Microstegium vimineum), multiflora rose (Rosa multiflora), mile-a-minute weed (Polygonum perfoliatum), and others.