Geographical distribution of Iceland gull.    Breeding  Migration  Nonbreeding  Nonbreeding (scarce)
Snell, R. R., P. Pyle, and M. A. Patten (2018). Iceland Gull (Larus glaucoides), version 2.0. In The Birds of North America (P. G. Rodewald, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi-org.acces.bibl.ulaval.ca/10.2173/bna.y00478.02
BirdLife International. 2016. Larus glaucoides. The IUCN Red List of Threatened Species 2016: e.T22694346A86727681. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22694346A86727681.en. Downloaded on 08 June 2018.
Cephas