No registration is required. There is no limit 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. Most of our walk will be on preserve limestone and earthen trails; wear appropriate shoes and clothing. Meet at the visitor parking lot on the north side of Mack Rd., located between Winfield Rd. and Rt. 59 in Warrenville.Leader: Kyle Wiktor, cell: 708-506-5186