| 80114 | Jehl, J.R. Jr., J. Francine and S.I. Bond 1990 Growth patterns of two races of California gull raised in a common environment. The Condor 92, 732-738. | 1990 | Larus californicus | --> | 
				
			| 3722 | Wood, J.B. and C.L. Day 1998 CephBase. http://www.cephbase.utmb.edu/. [Accessed 26/01/06]. | 1998 | Larus californicus | --> | 
				
			| 87784 | Schreiber, E.A. and J. Burger 2001 Biology of marine birds. Boca Raton, Florida: CRC Press. 722 p. | 2001 | Larus californicus | 230-470 | 
				
			| 114902 | Sibley, D. 2003 The Sibley Field Guide to Birds of Western North America. Alfred A. Knopf, Inc., 471 p. | 2003 | Larus californicus | 188 | 
				
			| 19 | Bisby, F.A., M.A. Ruggiero, K.L. Wilson, M. Cachuela-Palacio, S.W. Kimani, Y.R. Roskov, A. Soulier-Perkins and J. van Hertum 2005 Species 2000 & ITIS Catalogue of Life: 2005 Annual Checklist. CD-ROM; Species 2000: Reading, U.K. | 2005 | Larus californicus | --> | 
				
			| 81748 | Karpouzi, V.S. 2005 Modelling and mapping trophic overlap between fisheries and the world's seabirds. MSc thesis, Department of Zoology, University of British Columbia, Vancouver, BC, Canada. | 2005 | Larus californicus | --> | 
				
			| 356 | SAUP Database 2006 SAUP Database. www.seaaroundus.org. | 2006 | Larus californicus | --> | 
				
			| 7816 | Lepage, D. 2007 Avibase -the World Bird Database. http://www.bsc-eoc.org/avibase/avibase.jsp [accessed 09/07/2007]. | 2007 | Larus californicus | --> | 
				
			| 94798 | Puget Sound Action Team. 2007 2007 Puget Sound Update: ninth report of the Puget Sound ambient monitoring program, Puget Sound Action Team, Olympia, WA. http://wdfw.wa.gov/publications/01051/wdfw01051.pdf [Accessed 22 January 2014]. | 2007 | Larus californicus | 235 | 
				
			| 8442 | Karpouzi, V.S. and D. Pauly 2008 Life-history patterns in marine birds. In Palomares, M.L.D., Pauly, D. (Eds.), Von Bertalanffy Growth Parameters of Non-fish Marine Organisms. Fisheries Centre Research Reports 16(10). Fisheries Centre, University of British Columbia [ISSN 1198-6727], pp. 27-53. | 2008 | Larus californicus | --> | 
				
			| 116102 | Gallardo, J.C., V. Macias and E. Velarde 2009 Birds (Vertebrata: Aves) of the Gulf of Mexico. pp. 1321-1342 In Felder, D.L.; Camp, D.K. (eds.) Gulf of Mexico - Origins, Waters, and Biota. Biodiversity. Texas A&M University Press, College Station, Texas. | 2009 | Larus californicus | 1337 | 
				
			| 93875 | Backe, N., S. Davies, K. Conley, G. Kosmider, G. Rasmussen, H. Ibey and K. Ladell 2011 Race Rocks (XwaYeN) proposed marine protected area ecosystem overview and assessment report. Canadian Manuscript Report of Fisheries and Aquatic Sciences 2949:30p. | 2011 | Larus californicus | 15 | 
				
			| 93905 | Gaydos, J.K. and S.F. Pearson 2011 Birds and mammals that depend on the Salish Sea: a compilation. Northwestern Naturalist 92(2):79-94. | 2011 | Larus californicus | 83 | 
				
			| 127697 | IUCN 2022 The IUCN Red List of Threatened Species. Version 2022-1. . Downloaded 15 September 2022. | 2022 | Larus californicus | --> | 
				
			| 130435 | IUCN 2025 The IUCN Red List of Threatened Species. 1964 - onwards. https://www.iucnredlist.org/ | 2025 | Larus californicus | ver.2025-1 |