Pre-registration is not required for this walk. This site remains one of DuPage County’s premier birding spots. Walk around the marsh with us to check out winter birds. Northern Shrike and American Black Duck are among the several species of birds known to regularly winter here. Meet at the visitor parking lot on the north side of Mack Rd. (Mack is south of Roosevelt and north of Butterfield), located between Winfield Rd. and Rt. 59 in Warrenville. Be sure to dress for theweather.Leader: Kyle Wiktor, 708-506-5186