Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 8CY-9CY male 896P 2006 & 2007, Wörth, Austria & Włocławek Reservoir, Poland. Picture: Wolfgang Schweighofer & Magdalena Zagalska-Neubauer.
8-9th cy male 896P, ringed as chick in 1998. Top May 01 2006, bottom April 28 2007, Wloclawek - Vistula river, Poland. Bird to show variation of wing-tip of adult Caspian Gulls at the mixed colony at Włocławek Reservoir, central Poland. Birds are included only if all characters are within known cachinnans variation, to ensure that influence of argentatus (possible hybrids etc.) is minimal or lacking. All birds were trapped at nests during incubation. If there are photos of the same bird from different years, they are presented side by side.
below: cachinnans 8CY male 896P January 06 2006, Wörth, Austria. Picture: Wolfgang Schweighofer.
above: 8CY male 896P May 01 2006, Włocławek Reservoir, central Poland. Picture: Magdalena Zagalska-Neubauer.
below: 9CY male 896P April 28 2007, Włocławek Reservoir, central Poland. Picture: Magdalena Zagalska-Neubauer.
Below, table 1 is repeated to score this bird. Not all traits can be scored, the partial scores are in italic + bold.
Here, only 5 traits are visible from the image, score so far is 5, with theoretically another 10 points possible.