park in southeastern Ontario, Canada, lying southeast of Leamington, at the western end of Lake Erie. Established in 1918, it occupies an area of 6 square miles (16 square km) and comprises a wedge-shaped sandspit jutting into the lake. It lies astride a major flyway of wild ducks, Canada geese, swans, and other migratory birds, which find sanctuary in its marshland. The park has a variety of forest trees, shrubs, and fruit-bearing bushes and includes a large cattail marsh.