Butcher, G.S. and Niven, D.K. 2007. Combining data from the Christmas Bird Count and the Breeding Bird Survey to determine the continental status and trends of North American birds. National Audobon Society, New York, USA.
del Hoyo, J.; Elliott, A.; Sargatal, J. 1996. Handbook of the Birds of the World, vol. 3: Hoatzin to Auks. Lynx Edicions, Barcelona, Spain.
Wetlands International. 2018. Waterbird Population Estimates. Available at: https://wpe.wetlands.org. (Accessed: Thursday 16 Aug 2018).
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Recommended citation
BirdLife International (2024) Species factsheet: Franklin's Gull Larus pipixcan. Downloaded from
https://datazone.birdlife.org/species/factsheet/franklins-gull-larus-pipixcan on 25/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 25/11/2024.