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

(last update: January 01, 2023)

Herring Gull (argenteus) Y.BDS 1CY-9CY, September 2012 - September 2020, IJmuiden, the Netherlands. Pictures: Maarten van Kleinwee & Mars Muusse.

Ringed as pullus in breeding season 2012 at Forteiland, IJmuiden. Ringed by Fred Cottaar ringing team.
Please visit Maarten's blog: Gulls to the Horizon for excellent images!!!!

below: Herring Gull (argenteus) Y.BDS 9CY, September 10 2020, IJmuiden, the Netherlands (52.27N 04.33E).

P6/P9.

below: Herring Gull (argenteus) Y.BDS 9CY, March 31 2020, IJmuiden, the Netherlands (52.27N 04.33E).

Reading for breeding season.

below: Herring Gull (argenteus) Y.BDS 8CY, December 29 2019, IJmuiden, the Netherlands (52.27N 04.33E).

With attending chick.

below: Herring Gull (argenteus) Y.BDS 8CY, Augsut 29 2019, IJmuiden, the Netherlands (52.27N 04.33E). 

P5/P8.

below: Herring Gull (argenteus) Y.BDS 8CY, Augsut 07 2019, IJmuiden, the Netherlands (52.27N 04.33E). 

P3/P7.

below: Herring Gull (argenteus) Y.BDS 5CY, September 07 2016, IJmuiden, the Netherlands (52.27N 04.33E). 

P6/P9.

below: Herring Gull (argenteus) Y.BDS 5CY, August 30 2016, IJmuiden, the Netherlands (52.27N 04.33E). 

P6/P8.

below: Herring Gull (argenteus) Y.BDS 5CY, July 18 2016, IJmuiden, the Netherlands (52.27N 04.33E).

below: Herring Gull (argenteus) Y.BDS 5CY, April 09 2016, IJmuiden, the Netherlands (52.27N 04.33E). 

below: Herring Gull (argenteus) Y.BDS 5CY, February 24 2016, IJmuiden, the Netherlands (52.27N 04.33E).

below: Herring Gull (argenteus) Y.BDS 5CY, February 17 2016, IJmuiden, the Netherlands (52.27N 04.33E).

below: Herring Gull (argenteus) Y.BDS 4CY, December 03 2015, IJmuiden, the Netherlands (52.27N 04.33E).

below: Herring Gull (argenteus) Y.BDS 4CY, November 25 2015, IJmuiden, the Netherlands (52.27N 04.33E). 

below: Herring Gull (argenteus) Y.BDS 4CY, November 22 2015, IJmuiden, the Netherlands (52.27N 04.33E). 

Brown wash on greater primary coverts.

below: Herring Gull (argenteus) Y.BDS 4CY, September 20 2015, IJmuiden, the Netherlands (52.27N 04.33E). 

Bird in complete moult: P7 fg, P10 still old.

below: Herring Gull (argenteus) Y.BDS 4CY, September 03 2015, IJmuiden, the Netherlands (52.27N 04.33E). 

Bird in complete moult: P6 fg, P7 at P4, P8 missing, P9-P10 still old. S1 growing.

below: Herring Gull (argenteus) Y.BDS 4CY, August 18 2015, IJmuiden, the Netherlands (52.27N 04.33E). 

Bird in complete moult: P8-P10 still old. Tail old. Maybe S1 dropped?

below: Herring Gull (argenteus) Y.BDS 4CY, July 12 2015, IJmuiden, the Netherlands. Picture Maarten van Kleinwee.

Bird in complete moult: P6-P10 old 3rd gen, P1-P3 new. Reduced black on bill.

below: Herring Gull (argenteus) Y.BDS 4CY, February 16 2015, IJmuiden, the Netherlands.

Some immature markings in the coverts and much black on the bill.

below: Herring Gull (argenteus) Y.BDS 3CY, September 14 2014, IJmuiden, the Netherlands. Picture Maarten van Kleinwee.

End of complete moult: P8 fully grown, P10 mirror just visible, mirror on P9 present but not visible in image.

below: Herring Gull (argenteus) Y.BDS 3CY, July 30 2014, IJmuiden, the Netherlands.

In complete moult. P1-P6 fully grown, P5 with full subterminal band, P7 growing, P8 missing, P9-P10 old 2nd gen. PMS=35.
Central rectrices dropped (tail feather moult centrifugal, replacement outwards). Outermost secondary S1 replaced/growing, S2 missing.
Missing central GC expose 2nd gen secondary centres underneath.

below: Herring Gull (argenteus) Y.BDS 2CY, September 22 2013, IJmuiden, the Netherlands. Picture Maarten van Kleinwee.

End of complete moult: P10 almost fully grown. Single LLC replaced in partial moult.

below: Herring Gull (argenteus) Y.BDS 1CY, September 12 2012, IJmuiden, the Netherlands.

Local juvenile, post-juvenile moult in scapulars.