The Bailey-Matthews National Shell Museum & Aquarium will host a guided Snail Search and Biodiversity Walk on Aug. 9 from 10 to 11 a.m. at Estero Bay Preserve State Park (Winkler Road Access), at 17981 Winkler Road, Fort Myers. Participants will search for land snails, document their sightings for the benefit of science, and explore the flora and fauna. The walk is free, but advance registration is required. Parking costs $2 per vehicle. For more information or to register, contact Jorden Falker at jfalker@shellmuseum.org.