Geographical distribution of Glaucous-winged gull.    Breeding  Year-round  Nonbreeding
BirdLife International. 2016. Larus glaucescens. The IUCN Red List of Threatened Species 2016: e.T22694334A93449098. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22694334A93449098.en. Downloaded on 08 June 2018.
Cephas