Exelon Corporation

Swift Prairie

Addion, Illinois, United States

Certified through 2022

Project Name
Project Type
Swift Prairie
About the Program
ComEd, a unit of Exelon Corporation, manages the Swift Prairie, an 8-acre grassland in northern Illinois. The 8.4-acre site is primarily restored mesic prairie with pockets of higher quality wetlands. Over 120 species of vegetation are found at the site, 73.2% of which are native. Notable species include Indiangrass, Canada goldenrod, sawtooth sunflower, closed gentian, joint rush, cardinal flower, winged loosestrife, cowbane, fen betony and common ironweed. The team's objectives are to maintain the quality of prairie, increase vegetative cover and pollinator habitat, respond to threats with adaptive management, partner with the community on conservation initiatives and meet ComEd's prairie standards for biodiversity. Swift Prairie is one of over 35 sites currently in ComEd's Prairie Program.

Practices and Impacts
  • The team annually monitors and maintains the vegetation on-site through an ecological restoration contractor, Santec. Typical management activities consist of selective herbicide applications targeting invasive species, mowing, brush management and prescribed burning when needed. Pollinators within the habitat are also monitored annually.
  • A 2019 survey indicated an increase in diversity owing to recruitment of less conservative species, noting the presence of 90 native plant species. The team observed two species of milkweed and monarch butterflies in addition to other butterflies, bees wasps and flies.