Volunteer with the Audubon Society at the Bison Paddock of Golden Gate Park and help to restore the habitat of the endangered white crown sparrow. Lend a hand with weeding and tending a garden of native plants that comprise a critical nesting area for the endangered sparrow. Please wear appropriate attire: closed toed shoes, long pants and layers of clothing. Light refreshments are provided. Meet at the Bison Paddock, on JFK Drive between 36th Avenue and Chain of Lakes Drive East.