Did you know there are about 30 different species of earthworms in New England and only one of them is native?! Most of the earthworms that you see are non-native, invasive species that have been introduced from other continents. Come enjoy a moonlit, guided hike up to Great Hollow’s waterfall with our naturalist, John Foley, to learn more about these fascinating creatures and what this month’s “Worm Moon” is all about. We’ll talk about invasive earthworms and the dramatic effect they are having on our forests. Please wear sturdy footwear and bring a flashlight or headlamp. Appropriate for children ages 8 and up. Please, no dogs. Free for members; a suggested donation of $5/person for non-members is greatly appreciated. Sign up by emailing John at