CALIFORNIA CLAPPER RAIL TRENDS 2005-2007 APPENDIX 4 - Page 1 California Clapper Rail Surveys for the San Francisco Estuary Invasive Spartina Project 2007 Arrowhead Marsh – March 29, 2007 Prepared by: Hildie Spautz P. O. Box 2330 El Cerrito, CA 94530 Submitted to: Olofson Environmental, Inc. 2560 9th Street Berkeley, CA 94710 Prepared for: San Francisco Estuary Invasive Spartina Project State Coastal Conservancy 1330 Broadway, 13th Floor Oakland, CA 94612-2430 June 30, 2007 CALIFORNIA CLAPPER RAIL TRENDS 2005-2007 APPENDIX 4 - Page 2 This report was prepared for the California Coastal Conservancy’s San Francisco Estuary Invasive Spartina Project with support and funding from the following contributors: California Coastal Conservancy CALFED Bay-Delta Program (Interagency Agreement No. P0685608) California Wildlife Conservation Board (Memorandum of Agreement No. WC-30322) CALIFORNIA CLAPPER RAIL TRENDS 2005-2007 APPENDIX 4 - Page 3 CONTENTS 1.0 INTRODUCTION ....................................................................................................................................1 2.0 STUDY AREA............................................................................................................................................1 3.0 METHODS..................................................................................................................................................1 3.1 Field Methods ...................................................................................................................................1 3.1.1 Clapper Rail Breeding Season Call Count Surveys ........................................................1 3.2 Data Collection and Management..................................................................................................3 3.3 Site-level Spatial Data: GIS .............................................................................................................3 3.4 Data Interpretation and Analysis ...................................................................................................3 4.0 RESULTS.....................................................................................................................................................5 4.1 Alameda County................................................................................................................................5 4.2 San Mateo County.............................................................................................................................9 4.3 Marin County...................................................................................................................................10 5.0 DISCUSSION ...........................................................................................................................................11 6.0 REFERENCES .........................................................................................................................................12 7.0 ACKNOWLEDGEMENTS...................................................................................................................12 8.0 PERMITS ...................................................................................................................................................13 FIGURES AND TABLES Figure 1. California clapper rail survey sites, 2007......................................................................14 Figure 2. California clapper rail survey stations and locations of individuals detected. ..............15 Figure 2a. Emeryville Crescent West – Site 06b. ..........................................................................15 Figure 2b. Bayfarm Island and Bayfarm Island Bridge South – Site 17b .....................................16 Figure 2c. Arrowhead Marsh – Site 17c. .......................................................................................17 Figure 2d. Martin Luther King, Jr. Shoreline marshes – including Damon Marsh – Site 17d. ......................................................................................................................18 Figure 2e. Oakland Airport Channel – Site 17k ............................................................................19 Figure 2f. Oyster Bay Regional Shoreline – Site 20a....................................................................20 Figure 2g. North Marsh & Dogbone Marsh – Site 20c & 20f. ......................................................21 Figure 2h. Cogswell Marsh Section A – Northwest – Site 20m....................................................22 Figure 2i. Newark Slough – Site 05c.............................................................................................23 Figure 2j. Greco Island North – Site 02f........................................................................................24 Figure 2k. Sanchez Marsh - Site 19k.............................................................................................25 Figure 2l. SFO – San Francisco International Airport & Bayfront Park – Overview – Site 19h. ......................................................................................................................26 Figure 2m. SFO – San Francisco International Airport & Bayfront Park – Northern portion – Site 19h. .......................................................................................27 Figure 2n. SFO – San Francisco International Airport & Bayfront Park – Southern portion – Site 19h. .......................................................................................28 Figure 2o. Blackie’s Creek & Blackie’s Pasture – Site 03a. .........................................................29 Figure 2p. Pickleweed Park – Site 09. ...........................................................................................30 H. Spautz page i California Clapper Rail Surveys for 2007 June 30, 2007 Invasive Spartina Project CALIFORNIA CLAPPER RAIL TRENDS 2005-2007 APPENDIX 4 - Page 4 Figure 3a. Oyster Bay Regional Shoreline – Site 20a. ..................................................................31 Figure 3b. Oyster Bay Regional Shoreline – Site 20a. ..................................................................31 Figure 3c. Dogbone Marsh – Site 20c. ..........................................................................................32 Figure 3d. North Marsh – Site 20f.................................................................................................32 Figure 3e. SFO – San Francisco International Airport- northern portion Site 19h........................33 Figure 3f. SFO – San Francisco International Airport- southern portion - Site 19h. ....................33 Figure 3g. Blackie’s Creek & Blackie’s Pasture – Site 03a ..........................................................34 Figure 3h. Blackie’s Creek & Blackie’s Pasture – Site 03a ..........................................................34 Figure 3i. Blackie’s Creek & Blackie’s Pasture – Site 03a ...........................................................35 Figure 3j. Pickleweed Park – Site 09.............................................................................................35 Figure 3k. Pickleweed Park – Site 09. ...........................................................................................36 TABLE 1. Clapper Rail 2007 survey details: number of survey stations, station placement, survey protocol type, and dates. .................................................................................37 TABLE 2. Clapper Rail 2007 survey data: minimum and maximum number of clapper rails detected during each survey round, and minimum and maximum count for the 2007 season..........................................................................................................................39 TABLE 3. Clapper Rail 2007 survey results in metric units: survey area, site area, minimum and maximum density of clapper rails detected during each survey round, and final estimated minimum and maximum site population estimate .....................................41 TABLE 4. Clapper Rail 2007 survey results in English units: survey area, site area, minimum and maximum density of clapper rails detected during each survey round, and final estimated minimum and maximum site population estimate. ....................................42 APPENDICES Appendix 1. California Clapper Rail Official USFWS Draft Protocol, 2000: Survey Protocol A. ...............................................................................................................45 Appendix 2. Draft version of proposed revisions to the official protocol: Survey Protocol A. ...........................................................................................................................48 Appendix 2. Draft version of proposed revisions to the official protocol: Survey Protocol B.............................................................................................................................53 Appendix 3. Draft version of proposed revisions to the official protocol: Survey Protocol C.............................................................................................................................58 Appendix 4. California clapper rail call count survey datasheet. .................................................61 Appendix 5. California clapper rail survey data interpretation methods......................................63 Appendix 6. California clapper rail survey station coordinates....................................................65