Larus cachinnans

(last update: February 16, 2013)

Greg Neubauer
Marcin Przymencki
Albert de Jong
Mars Muusse


cachinnans plumages

From the Rarities Committee's files - Identification of Caspian Gull. Part 2: phenotypic variability and the field characteristics of hybrids, by Chris Gibbins, Grzegorz Neubauer and Brian Small, IN: BB 104/2011.

Fig. 1. Location of sampling areas relative to the distribution of Herring Larus argentatus and Caspian Gulls L cachinnans. For completeness, the breeding range of Yellow-legged Gull L michahellis is also shown. The distributions are taken from Malling Olsen & Larsson (2003). However; for Caspian Gull we have added shading (light green) to include recently colonized areas in Poland. This species has also colonized inland Russia, Belarus and Lithuania, and is known to breed in eastern Germany, but the paucity of data from these areas means that the distribution shown in this figure is best treated as approximate. The two black lines delimit the approximate hybrid zone, based on the best available current knowledge.