Audubon Canyon Ranch, a nonprofit preserve, has become one of the West Coast's largest nesting grounds for great blue herons and great egrets.
In 1962, Martin Griffin, president of the Marin Audubon Society, led an effort to buy the ranch and turn it into a sanctuary, killing plans by developers who wanted to drain the lagoon to make way for homes, shops and a marina. A white Victorian home, sitting at the base of a steep canyon, is the headquarters for the preserve. Two milking barns have been converted into classrooms and exhibit halls.