IJmuiden Project - Fred Cottaar, José Verbeek, Maarten van Kleinwee & Mars Muusse

(last update: January 01, 2023)

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Y.AMF
NLA 5.xxx.xxx
Herring Gull
sex?, pullus
ringed: July 05 2010
Forteiland IJmuiden, -
 
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Herring Gull (argenteusY.AMF 1CY, August - December 2010, IJmuiden, the Netherlands. Picture: Mars Muusse.

Ringed as pullus in breeding season 2010 at Forteiland, IJmuiden. Ringed by Fred & Kees as juvenile on July 05 2010.

below: Herring Gull (argenteusY.AMF 1CY, December 09 2010, IJmuiden, the Netherlands. Picture: Mars Muusse.

Replaced scapulars for 2nd gen feathers: US: 100%, LS 75-99%, TOT SCAPS: 75-99%. Head, neck and flanks 2nd gen as well. Coverts and tertials juvenile.
It's interesting to see that the 2nd gen like 'spaghetti pattern' on the tip of tt4 was not very obvious in the fresh juvenile plumage, as it is now in December.

below: Herring Gull (argenteusY.AMF 1CY, August 13 2010, IJmuiden, the Netherlands. Picture: Mars Muusse.