Heuglin's Gull (L. heuglini / antelius)

(last update: 26-1-2011)
Coordinators:
Amir Ben Dov (Israel)
Chris Gibbins (Scotland)
Hannu Koskinen (Finland)
Mars Muusse (the Netherlands)

ID 2cy heuglini research

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Lesser Black-backed Gull 31 graellsii, May 08 2006 Moerdijk, The Netherlands. Picture: Mars Muusse. 

Measuring grey tones in upperparts. In our reserach, the bird's upperparts were photographed together with the Kodak Grey Scale. Images were then processed in Adobe Photoshop grey-mode, to correct for any hue. The idea is illustrated in the drawing by Andreas.

Source: Die Mantelfärbung deutscher Heringsmöwen Larus fuscus, Andreas Noeske