Great Backyard Bird Count, Feb. 15, 1-2:30 p.m., Grass Island Park, 1 Grass Island Rd., Greenwich. Join Audubon Naturalists to count waterbirds and land birds in Greenwich Harbor as part of the Cornell Lab of Ornithology’s annual Great Backyard Bird Count. Dress in warm layers and bring binoculars if you have them. Free. Contact Ryan MacLean at email@example.com to register. Info: gbbc.birdcount.org.
Mid-winter book sale, Feb. 16-17, 9 a.m.-5 p.m., Pequot Library, 720 Pequot Ave., Fairfield. Info: pequotlibrary.org.