Phenotypic characterization, taxonomic rank and phylogenetic relationships of Armenian Gull Larus armenicus
Dorit Liebers & Andreas J. Helbig
published: Limicola 13-6, 1999 (in German, with English summary)
Fig 9: Larus cachinnans female at Asow Sea, Ukraine, April 1997. Picture: Dorit Liebers.
Note the prominent black markings on the bill (representative for 51% of the breeding birds in two colonies, n = 239).
|