San Juan Nature Institute’s Orcas Spring Lecture Series will take place at 7 p.m. on Wednesdays at the Orcas Senior Center. The schedule is as follows:

May 7 – Glass Sponge Reefs in NW Waters, Oceanographer Paul Johnson, University of Washington

May 14 – Hydrology of Cascade Creek Watershed, Jeff Bash, Watershed Lead, Department of Ecology

May 21 – Geology of Turtleback & Orcas Island, Dr. Ned Brown, Professor Emeritus, Western Washington University

June 4 – Natural History of Turtleback, Eliza Habegger, Land Steward, SJC Land Bank

All are welcome at no charge. Refreshments will be served. Info: 378-3646 or www.sjnature.org.