Moerdijk Field Research 2005-2006

(last update: 14 August 2010)

coordinators: 
Roland-Jan Buijs
Theo Muusse
Mars Muusse

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Introduction
Methods
Age, origin & sex
Retrapped Birds
Upperparts Greytone
Black on Primary Coverts
Black on Primaries
P10 and P9 Patterns
P5 Pattern
Red & Black on Bill
Iris & Orbital Ring
Primary Moult
Discussion
References

Larus argentatus argenteus male HE, 04 May 2006, Moerdijk, the Netherlands.

P10 hrey ends more or less rectangular at the medial band.

P10 has a complete black sub-terminal band.

P9 mirror confined to inner web.

P5 has a "W" sub-terminal band.

P6 has a bajonet, albeit very short.

White tongue tips.

But, not really a "W" on P6.