TABLE OF CONTENTS 



INTRODUCTION 1 



THE NATURE OF SEABIRDS 1 



THREATS TO SEABIRDS 2 



METHODS 7 



DISCUSSION 11 



SPECIES ACCOUNTS: 



Fork-tailed Storm-Petrel (Oceanodroma furcata) 20 



Leach's Storm-Petrel (Oceanodroma leucorhoa) 22 



Ashy Storm-Petrel (Oceanodroma homochroa) ,24 



Black Storm-Petrel (Oceanodroma melania) 26 



Brown Pelican (Pelecanus occidentalis) 28 



Double-crested Cormorant (Phalacrocorax auritus) 30 



Brandt's Cormorant (Phalacrocorax penicillatus) 32 



Pelagic Cormorant (Phalacrocorax pelagicus) 34 



Black Oystercatcher (Haematopus bachmani) 36 



Western Gull (Larus occidentalis) 38 



Common Murre (Uria aalge) . 40 



Pigeon Guillemot (Cepphus columba) 42 



Marbled Murrelet (Brachyramphus marmoratus) 44 



Xantus' Murrelet (Endomychura hypoleuca) 46 



Cassin's Auklet (Ptychoramphus aleuticus) 48 



Rhinoceros Auklet (Cerorhinca monocerata) 50 



Tufted Puffin (Lunda cirrhata) .52 



MAPS AND TABLES: 



How to Use Maps and Tables 56 



Map Index 57 



Section 325, Eureka 58 



Section 379, Ukiah 106 



Section 404, Santa Rosa 142 



Section 429, San Francisco 180 



Section 454, Monterey 212 



Section 477, San Luis Obispo 236 



Section 501 , Santa Maria 260 



Section 502, Los Angeles 282 



Section 524, Long Beach 298 



Section 525, Santa Ana 318 



Section 545, San Diego 326 



REFERENCES 341 



APPENDIX A: Data Archives 35 1 



APPENDIX B: Observation Points for Seabird Colonies 355 



APPENDIX C: Index of California Seabird Colonies . .366 



