IJmuiden Project - Fred Cottaar ringing team
(last update: April 01, 2026)
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| Y.FUM |
| NLA 5.636.701 |
| Lesser B-backed Gull |
| male, adult |
| ringed: May 18 2026 |
| Forteiland IJmuiden, Zuidvlak |
| Relations: |
| Y.DAB male, partner 2026 |
| - |
Lesser Black-backed Gull (graellsii) Y.FUM adult, 2026, IJmuiden, the Netherlands. Picture: IJmuiden Ringing Team.
Ringed as breeding adult in breeding season 2026 at Forteiland, IJmuiden. Ringed by Fred Cottaar ringing team.
below: Lesser Black-backed Gull (graellsii) Y.FUM >4CY, May 18 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 | YDAB | 426 | - | 121,4 | 54,5 | 17,8 | - | 833 | - |
Attempt to trap YDAB and remove iron from chest. Failed, trapped the partner instead. However, both YFUM and YDAB have male biometrics?
Food: bolus worms.
