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 FT 1CY-2CY, May 2021 - April 2022, De Kreupel & Almere, the Netherlands & Gijón, Spain. Picture: César Fernández González, Eric Roeland, Thijs Horst & Leon Kelder.
Pale blue tibia ring p[FT] and metal NLA Arnhem 5.556.715, ringed as pullus on May 14 2021 at nest C06 21 in colony De Kreupel island C, the Netherlands (NL 5247.00 N 513.00 E) - ringer Leon Kelder.
ID uncertain: 1 parent seems to be Herring Gull argentatus-type, other parent is unknown. Still, picture June 2021 illustrates clear cachinnans influences.
Recoveries:
20-05-2021, IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Leon Kelder
11-06-2021, IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Leon Kelder
17-07-2021, IJmuiden (Forteiland), Noord-Holland, NL 5.228,00 N 434,00 E colourring read Fred Cottaar
22-07-2021, Katwijk aan Zee (Buitenwatering), Zuid-Holland, NL 5.212,00 N 423,00 E colourring read Annelies Marijnis
04-08-2021, Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
13-10-2021, Gijón (Strand), Asturias, SPANJE 4.332,00 N 539,00 W colourring read César Fernández
11-03-2022, Cambados (Haven), Pontevedra , SPANJE 4.230,00 N 849,00 W colourring read Manuel Angel Agulla Núñez
16-04-2022, Almere (Dashorstdijk), Flevoland, NL 5.225,00 N 512,00 E colourring read Thijs Horst
Visits & data 2021:
| Date: | details: | |||||
| 14-5-2021 | 3 chicks in nest. | metal: | tibia: | mass (gr): | head + bill: | tarsus: |
| Prey: 1x Roach; 2x Eel. | NLA 5.556.713 | Pale FR | 92 | 54.6 | 31.9 | |
| https://waarneming.nl/observation/214662060/ | NLA 5.556.714 | Pale FS | 106 | 56.8 | 33.3 | |
| NLA 5.556.715 | Pale FT | 76 | 51.3 | 29.1 | ||
| 20-5-2021 | 3 chicks in nest. | metal: | tibia: | mass (gr): | head + bill: | wing: |
| Prey: 1x Roach; 1x Rounded Goby. | NLA 5.556.713 | Pale FR | 313 | 71.1 | 52.0 | |
| https://waarneming.nl/observation/214706998/ | NLA 5.556.714 | Pale FS | 296 | 72.4 | 57.5 | |
| NLA 5.556.715 | Pale FT | 207 | 67.0 | -- | ||
| 11-6-2021 | 3 chicks in nest. | metal: | tibia: | mass (gr): | head + bill: | wing: |
| Prey: 4x Roach & 1x Perch (vomited) | NLA 5.556.713 | Pale FR | 1094 | 117.0 | 278.5 | |
| https://waarneming.nl/observation/216984901/ | NLA 5.556.714 | Pale FS | 917 | 113.4 | 277.5 | |
| NLA 5.556.715 | Pale FT | 1104 | 114.7 | 253.0 | ||
below: Caspian Gull cachinnans FT 2CY, April 26 2022, Almere, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans FT 1CY, October 13 2021, Gijón, Asturias, Spain. Picture: César Fernández González.
In all respects resembling cachinnans.
below: Caspian Gull cachinnans F9 1CY, August 04 2021, Almere, the Netherlands. Picture: Eric Roeland.
below: Caspian Gull cachinnans FT 1CY, June 11 2021, De Kreupel - C, the Netherlands. Picture: Leon Kelder.
below: Caspian Gull cachinnans FT 1CY, May 14 2021, De Kreupel - C, the Netherlands. Picture: Leon Kelder.
