IJmuiden Project - Fred Cottaar ringing team

(last update: April 01, 2026)

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Y.FWR
NLA 5.434.272 (old)
Lesser B-backed Gull
male, pullus
ringed: July 02 2007
IJmuiden, Middensluiseiland
NLA 5.636.733 (new)
male, 20CY
ringed: May 22 2026
Forteiland IJmuiden, Duintjes Midden
 
Relations:
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Lesser Black-backed Gull (graellsii) Y.FWR adult, 2026, IJmuiden, the Netherlands. Picture: IJmuiden Ringing Team.

Ringed as pullus in 2007, only metal ring. Ringed by Fred Cottaar ringing team.
Trapped as breeding adult in breeding season 2026 at Forteiland, IJmuiden. Metal ring replaced, and plastic ring added. Ringed by Fred Cottaar ringing team.

below: Lesser Black-backed Gull (graellsii) Y.FWR 20CY, May 22 2026, IJmuiden, the Netherlands. Picture: IJmuiden Ringing Team.

nest partner wing tarsus head-bill bill gonys greytone mass swab code
caught on nest 3 eggs - 427 68,2 126,2 58,2 19 11 893
26B02843 SERUM

CONTROLL. Was NLA 5434272, pullus 2007, IJmuiden. Metal ring replaced.