Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
Home
Project Info
International trend
National trend
Site characteristics
Breeding biology
Fecundity
Food resources
Nonbreeding season
Breeding species
Hybrid scores
Ring codes
Future |
Caspian Gull cachinnans 2.9 4CY, April 08 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
You can participate in this project too!
Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |
Tibia R-29 and metal NLA 5.623.562, ringed as pullus Larus cachinnans on May 20 2022 at IJsselmeer (De Kreupel), Holland (5247.00 N 513.00 E). Ringer: Leon Kelder.
Recoveries:
08-04-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
Data for this nest
Bird from De Kreupel, nest M10 on island M.
Date: |
Egg code |
Height (mm) |
Width (mm) |
Comments |
Metal NLA |
Colour ring |
Wing (mm) |
Head+ bill (mm) |
Bill (mm) |
Mass (gr) |
|
|
|
|
|
|
|
|
|
|
|
29-4-2022 |
|
|
|
3 eggs |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
13-5-2022 |
|
|
|
3 eggs |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
20-5-2022 |
|
|
|
3 pulli in nest |
5623560 |
Red 2.7 |
|
61.0 |
|
160 |
|
|
|
|
pellet = spike perch 10 cm |
5623561 |
Red 2.8 |
|
57.1 |
|
121 |
|
|
|
|
|
5623562 |
Red 2.9 |
|
65.5 |
|
225 |
below: Caspian Gull cachinnans 2.9 4CY, April 08 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.

|