Johnson's Mills is a critical feeding and resting site for the shorebirds that fly through the Bay of Fundy on their fall migration. Approximately half of the world's population of semipalmated sandpipers feed on the mudflats during peak migration (mid August). The best time to see the birds is two hours before, to two hours after high tide. Managed by the Nature Conservancy of Canada, the Johnson's Mills Shorebird Interpretive Centre is located 8 km (5 mi.) from the Village of Dorchester.