Geographical distribution of Pacific loon.    Breeding  Nonbreeding
BirdLife International. 2016. Gavia pacifica. The IUCN Red List of Threatened Species 2016: e.T22697839A93643209. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22697839A93643209.en. Downloaded on 27 June 2018.
Cephas