Ever wonder what marine life can be found at the head of Camden Harbor, where the Megunticook River flows into the ocean?

Diann Henderson, a student in the Maine Master Naturalist Program, will help participants explore this question with a brief talk in the Camden Public Library, followed by an interactive walk at low tide (wear shoes or boots suitable for mud). The first Tide Walk is Wednesday, June 19, at 1 p.m.

Henderson is a Camden native who, like many, left the state and has just returned as a retiree. Her most recent job as a middle school math and science teacher took her to international schools in Cambodia, China, Russia, and Ecuador. Three beach walks are scheduled during low tide this summer: Wednesday, June 19, 1 to 2:30 p.m.; Monday, July 15, 10 to 11:30 a.m.; and Tuesday, Aug. 6, 4 to 5:30 p.m.