coordinators:
Roland-Jan Buijs
Theo Muusse
Mars Muusse
Home
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
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Larus argentatus argenteus male H7, 05 May 2006, Moerdijk, the Netherlands.
Male. Iris speckling: 5-10%.
![](hgbills/hgoh7/DSCN0270.jpg)
![](hgbills/hgoh7/DSCN0271.jpg)
![](hgbills/hgoh7/DSCN0272.jpg)
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