Geographical distribution of California gull.    Breeding  Migration  Year-round  Nonbreeding
Winkler, D. W. (1996). California Gull (Larus californicus), version 2.0. In The Birds of North America (A. F. Poole and F. B. Gill, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi-org.acces.bibl.ulaval.ca/10.2173/bna.259
Cephas