Every year, thousands of visitors come to Audubon Canyon Ranch’s Martin Griffin Preserve (formerly Bolinas Canyon Preserve) in western Marin County, which has one of the most studied Great Blue Heron and Great Egret nesting sites on the West Coast. Golden Gate Bird Alliance, which helped establish the ACR, is responsible for providing hosts during the public season. These volunteers greet and direct visitors and answer questions about the heronry. All information that hosts need is provided in advance. Golden Gate Bird Alliance is seeking hosts for the following dates: March 19 and 20; April 16 and 17; May 7, 8 (Mother’s Day), 28, and 29; June 11 and 12; and July 4. If you are interested or want more information, contact Volunteer Coordinator Noreen Weeden, 510.843.9374, volunteer@goldengatebirdalliance.org.