Spring Saturday Mornings at Northwestern University's Campus. This area is a stopover for migrants of all kinds heading north.  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.  Leader: Nancy Halliday and TBA.  From 10:30-11:30 ENSBC will sponsor an informal “Birds and Bagels” walk at Clark St. Beach Bird Sanctuary. Meet at the Clark St. Beach House.