KEENE VALLEY — A presentation, “Unveiling the Secret Lives of Nesting Adirondack Loons,” will be held from 2 to 3 p.m. on Aug. 21 at the Keene Valley Library. The event will provide a summary of some of the findings of Adirondack Center for Loon Conservation’s nest camera study, as well as information about loon behavior and natural history and an overview of ACLC’s work overall. There will also be a kids craft event titled: “Build a Loon Nest.” This event is free and open to the public.