Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
Caspian Gull cachinnans K.D adult, 2021-2025, De Kreupel & Houten, the Netherlands. Pictures: Merijn Loeve, Herman Bouman, Thijs Horst & Mars Muusse.
| You can participate in this project too! Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl |
Recoveries for r-KD:
30-07-2021 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
22-11-2021 Houten (Vuiloverslag), Utrecht, NL 5.200,00 N 511,00 E colourring read Herman Bouman
07-12-2021 Houten (Vuiloverslag), Utrecht, NL 5.200,00 N 511,00 E colourring read Herman Bouman
29-04-2022 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Roland-Jan Buijs
30-06-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
13-09-2023 Almere (Dashorstdijk), Flevoland, NL 5.225,00 N 512,00 E colourring read Thijs Horst
29-06-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Peter van Horssen
04-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Peter van Horssen
13-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst, M. Muusse & N. Colpaert
18-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Peter van Horssen
18-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Loeve
Bird breeding at De Kreupel in 2021: nest L4 on island L. Data for this nest:
| date: | egg no: | width (mm): | length (mm): | volume (cm3): | comments: | ||
| 23-4-2021 | A | 48.4 | 69.3 | 2 eggs. Location is Kreupel - L nest 4. One parent trapped at nest. | |||
| 23-4-2021 | B | 48.6 | 70.3 | ||||
Bird breeding again at De Kreupel in 2022: nest L15 on island L. Data for this nest:
| Date: | Egg code | Height (mm) | Width (mm) | Comments | Metal NLA | Colour ring | Wing (mm) | Head+ bill (mm) | Bill (mm) | Mass (gr) | Tarsus | Gonys | Swab no |
| 14-4-2022 | A-egg | 72.4 | 49.9 | 2 eggs | |||||||||
| B-egg | 71.9 | 51.1 | |||||||||||
| 29-4-2022 | 3 eggs | ||||||||||||
| Adult trapped, Caspian Gull r-KD | 6211439 | Red KD | 467 | 139.5 | 68.4 | 1145 | 74,7 | 19.5 | 1071 | ||||
| Was ringed at nest in 2021 | |||||||||||||
| 13-5-2022 | 3 pulli in nest | 5623520 | Red 1.W | 49.4 | 62 | ||||||||
| 5623521 | Red 1.X | 54.9 | 111 | ||||||||||
| 5623522 | Red 1.Y | 53.6 | 99 | ||||||||||
| 5623521 | Red 1.X | 207.0 | 100.6 | 774 | 955 | ||||||||
| 5623522 | Red 1.Y | 205.0 | 97.3 | 726 | 957 |
below: Caspian Gull cachinnans K.D adult, July 13 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
.JPG)
below: Caspian Gull cachinnans K.D adult, December 7 2021 Houten (Vuiloverslag), the Netherlands. Pictures: Herman Bouman.
below: Caspian Gull cachinnans K.D adult, November 22 2021 Houten (Vuiloverslag), the Netherlands. Pictures: Herman Bouman.
below: Caspian Gull cachinnans K.D adult, April 23 2021, De Kreupel - L, the Netherlands. Pictures: Merijn Loeve.
Coordinator: Leon Kelder.
Ringers: Roland-Jan Buijs, Leon Kelder & Merijn Loeve.
r[K.D] and metal NLA 6.211.439, Caspian Gull Larus cachinnans 4+CY male, sub-adult markings on primary coverts indicate 5CY bird.
Wing: 472
Head + Bill: 141,0
Bill: 70,5
Bill height: 19,8
Kodak grey scale:
6,5
Weight: 1145
Moult in primaries: P1-P10 old.
