September 8, 15, 22, 29. Citizen Science September. 3:30 p.m.-5:00 p.m. Drop in to a special area of the Garden each Monday to learn from local experts how kids and adults alike can help collect data about a species that will be submitted to real-world scientists. September 8-Monarchs. September 15-Dragonflies. September 22-Hummingbirds. September 29-Squirrels. Free with Garden admission.