Larus cachinnans

(last update: February 16, 2013)

Coordinator:
Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)

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cachinnans plumages

Larus cachinnans hybrid? adult, October 26 2007, Westkapelle, the Netherlands. Picture: Ies Meulmeester.

Presumed hybrid cachinnans x argentatus, note the heavy bill and large gonys angle and the pale yellowish iris. The pattern on P5 is also not good for a pure cachinnans, the unbroken subterminale black band is missing. On the last picture you can see P5, this primary show a black spot on the outer web and only a very small black marking on the inner web nearby the shaft of this feather. Note almost thayeri-pattern on P10.