Heuglin's gull (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Heuglin's gull" in English language version.

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britishbirds.co.uk

Collinson, J.M.; Parkin, D.T.; Knox, A.G.; Sangster, G.; Svennson, L. (2008). "Species boundaries in the Herring and Lesser Black-backed Gull complex" (PDF). British Birds. 101 (7): 340–363. Archived from the original (PDF) on 2020-12-03. Retrieved 2017-04-21.

Burger, J.; Gochfeld, M.; Kirwan, G.M.; Christie, D.A.; de Juana, E.; Garcia, E.F.J. (2020). "Lesser Black-backed Gull (Larus fuscus)". In del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions. doi:10.2173/bow.lbbgul.01. S2CID 218849076. Retrieved 21 April 2017.

Burger, J.; Gochfeld, M.; Kirwan, G.M.; Christie, D.A.; de Juana, E.; Garcia, E.F.J. (2020). "Lesser Black-backed Gull (Larus fuscus)". In del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions. doi:10.2173/bow.lbbgul.01. S2CID 218849076. Retrieved 21 April 2017.

Burger, J.; Gochfeld, M.; Kirwan, G.M.; Christie, D.A.; de Juana, E.; Garcia, E.F.J. (2020). "Lesser Black-backed Gull (Larus fuscus)". In del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions. doi:10.2173/bow.lbbgul.01. S2CID 218849076. Retrieved 21 April 2017.

Collinson, J.M.; Parkin, D.T.; Knox, A.G.; Sangster, G.; Svennson, L. (2008). "Species boundaries in the Herring and Lesser Black-backed Gull complex" (PDF). British Birds. 101 (7): 340–363. Archived from the original (PDF) on 2020-12-03. Retrieved 2017-04-21.

Gill, Frank; Donsker, David, eds. (2019). "Noddies, gulls, terns, auks". World Bird List Version 9.2. International Ornithologists' Union. Retrieved 24 June 2019.