Type of Document:
Audubon Canyon Ranch (ACR) has been monitoring the number of nesting herons and egrets on West Marin Island since 1979 and the annual reproductive success of Great Egrets and Great Blue Herons since 1993. Nests are monitored annually during repeated visits, from viewing positions on East Marin Island and by boat. This work is part of a regional study of heron and egret colonies in the northern San Francisco Bay area (Kelly et al. 1993, 2006, 2007, 2008a).
Web Page Link:
Kelly, J. P., B. Fischer, and T. E. Condeso. 2011. Heron and egret monitoring results at West Marin Island: 2011 nesting season. Report to the San Pablo Bay National Wildlife Refuge. ACR Tech. Rpt. 90-3-24 © November 2011, Audubon Canyon Ranch Cypress Grove Research Center, PO Box 808, Marshal, CA 94940.