Saturday mornings at Northwestern University. This area is a stopover for migrants of all kinds heading north in spring.  Meet at 8:30 a. m. Park on the lake side of the upper deck of the south parking lot off of Sheridan Rd. and Clark St., north of Clark St. beach, at 8:30 a.m.  Leaders: Libby Hill. Nancy Halliday (May 2) and other possible dates and leaders TBA..