2022 MONITORING RESULTS FROM THE DESILVA ISLAND HERONRY A report to the DeSilva Island Home Owners’ Association


Lumpkin, D., and T. E. Condeso

Publication Date:
October 2022

The heronry at DeSilva Island, in Marin County, California, is one of many colony sites that are monitored by Audubon Canyon Ranch as part of its Heron and Egret Project. The Project was initiated in 1990 and reflects an ongoing effort to monitor the status of colonially nesting herons and egrets throughout five counties in the northern San Francisco Bay region. The primary goal of the Heron and Egret Project is to develop and apply current and historical information on status of herons and egrets to wetland conservation concerns in the San Francisco Bay area. Specifically, the project focuses on monitoring local and regional trends in nesting abundance and reproductive performance.

Type of Document:

Technical Report

PDF is:

Full report

Web Page Link:

Lumpkin, D., and T. E. Condeso. 2022. 2022 Monitoring results from the DeDilva Island Heronry. A report to the DeSilva Island Home Owners’ Association. ACR Technical Report, © Audubon Canyon Ranch, Cypress Grove Research Center, P. O. Box 808, Marshall, CA 93940.