section_heading: Izvori
paragraph_text: {{Izvori|refs= Ackerman, J. T., J. Y. Takekawa, C. Strong, N. Athearn, and A. Rex. (2006) California Gull distribution, abundance, and predation on waterbird eggs and chicks in South San Francisco Bay. Final Report, U. S. Geological Survey, Western Ecological and Research Center, Davis and Vallejo, CA.  {{cite journal |last=Jehl |first=Joseph R. Jr. |last2=Francine |first2=J |last3=Bond |first3=S. I. |year=1990 |title=Growth patterns of two races of California Gulls raised in a common environment |journal=Condor |volume=92 |issue=3 |pages=732–738 |url=http://sora.unm.edu/sites/default/files/journals/condor/v092n03/p0732-p0738.pdf |doi=10.2307/1368692}} {{cite journal |last=Karl |first=S. A. |last2=Zink |first2=R. M. |last3=Jehl |first3=Joseph R. Jr. |year=1987 |title=Allozyme analysis of the California Gull (Larus californicus) |journal=Auk |volume=104 |issue=4 |pages=767–769 |url=http://sora.unm.edu/sites/default/files/journals/auk/v104n04/p0767-p0769.pdf |jstor=4087291}} {{cite web |url=http://onlinelibrary.utah.gov/research/utah_symbols/bird.html |title=Utah State Bird |accessdate=11. kolovoza 2014. |publisher=Utah.gov |archive-date=22. siječnja 2020. |archive-url=https://web.archive.org/web/20200122135458/http://onlinelibrary.utah.gov/research/utah_symbols/bird.html |url-status=bot: unknown }} {{cite book |title=Birds of the Great Basin |first=Fred A. |last=Ryser |year=1985 |location=Reno, NV, USA |publisher=University of Nevada Press |page=203 |isbn=0-87417-080-X |url=https://books.google.com/books?id=bxpXq_hMxfAC&pg=PA203 |accessdate=11. kolovoza 2014. |url-status=dead }} Sibley, David Allen (2000): The Sibley Guide to Birds. Alfred A. Knopf, New York. {{ISBN|0-679-45122-6}}