Ever wondered who lives beneath the surface of your rivers and ponds? From whirligigs to water boatmen, it's a fascinating world!

The Lancaster Friends of the Nashua River invite you to join them for this free family workshop led by Nashua River Watershed Association's River Classroom Director Stacey Chilcoat. On Sunday, Sept. 9 at 1 p.m. at the Cooks Conservation Area in Lancaster, discover what aquatic insects live in the river during their "teenage years" through collection, sorting, identifying these animals and their adult forms as well. We will use magiscopes (outdoor microscopes) for close examination and compare them. Find out what they have to tell us about the health of our water.

Attendees should meet at the entrance to the Cooks Conservation area which is located on the west side of Route 70 (Lunenburg Road) about one mile north of Route 117, in Lancaster.

Pre-registration is requested for planning purposes.

To register, or for more information, please contact David Spanagel, coordinator for the Public Education Initiative for the Lancaster Friends of the Nashua River at davidspanagel@comcast.net .