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

(last update: January 01, 2023)
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Y.BPS
NLA x.xxx.xxx
Herring Gull
male, 4CY
ringed: May 26 2014
Forteiland IJmuiden, -
 
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Herring Gull (argenteus) Y.BPS 4CY, June 02 2014, IJmuiden, the Netherlands. Picture: Maarten van Kleinwee.

Ringed as breeding adult in season 2014 at Forteiland, IJmuiden. Ringed by Fred Cottaar ringing team.

Plesae visit: GULLS TO THE HORIZON, for more images.

below: Herring Gull (argenteus) Y.BPS 4CY, June 02 2014, IJmuiden, the Netherlands. Picture: Maarten van Kleinwee.

Maarten: "I find it fascinating that gulls of this age are chosen by adults to start a bond and to actively take part in the breeding process, despite the immature plumage features. Does this indicate that pair bonding is all to do with postures and vocalisation, or does it mean that there is a shortage of adult males?". Good question.

Ringed as breeding sub-adult on June 02 2014 and ringed as Green Y.BPS in the gull colony of IJmuiden (Forteiland), the Netherlands. It was trapped on the nest while breeding. Ageing as 4th calendar year was based on the brown coverts, the adult looking primaries and the presence of the markings in the tail. Measurements indicated male.

Phenotypics: orange orbital ring, black on both mandibles, red on lower mandible. Fleshy legs.
Full bands on P5, P9, P10. Moult: P1 dropped. PMS=1.