Herring Gull- Zilvermeeuw (argentatus & argenteus)

(last update: December 15, 2011 )

Coordinators:
Jean-Michel Sauvage (France)
Mars Muusse (the Netherlands)

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Herring Gull plumages:

hg 1cy July
hg 1cy August
hg 1cy September
hg 1cy October
hg 1cy November
hg 1cy December

hg 2cy January
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hg 3cy January
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hg 3cy July
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hg 3cy December

hg sub-ad January
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Herring Gull (argenteus) YAZF 1CY & 3CY, August 2011 & April 2013, IJmuiden & Brouwersdam, the Netherlands.

Ringed as pullus on July 11 2011 at IJmuiden, the Netherlands.

below: Herring Gull (argenteus) YAZF 3CY, April 07 2013, Brouwersdam, the Netherlands. Picture: Frank van der Meer.

Almost all scaps grey. Partial autumn moult only included 2x upper tertials. Base of bill starts to turn yellow in spring.

below: Herring Gull (argenteus) YAZF 1CY, August 25 2011, IJmuiden, the Netherlands.

Few scaps replaced.