Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse

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Lesser Black-backed Gull graellsii 2.= 1CY, May 26 2022, De Kreupel, the Netherlands.

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Tibia R-2= and metal 5.623.538, ringed as pullus Larus fuscus on 26-5-2022 at IJsselmeer (De Kreupel), Noord-Holland, NL 5247.00 N 513.00 E. Ringer: Leon Kelder.

Recoveries:
05-08-2022 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Thijs Horst
01-10-2022 Dungeness (Strand), Kent, ENGELAND 5.054,00 N 58,00 E colourring read Martin Casemore
05-05-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
10-06-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
24-06-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
08-07-2025 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
26-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Thijs Horst

Bird from De Kreupel, nest M16 on island M. Data for this nest:

Date: Egg code Height (mm)  Width (mm) Comments Metal NLA Colour ring Wing (mm) Head+ bill (mm) Mass (gr) Swab no
29-4-2022   2 eggs
13-5-2022 3 eggs
26-5-2022 2 pulli, 1 ei 5623538 Red 2.= 48.3 61
5623595 Red 3.B 47.5 61
03-6-2022 1 cold egg
23-6-2022 Lesser Black-backed 5623538(95?) Red 3.B 280 106.5 768 1275
  Lesser Black-backed 5623538 Red 2.= 268.5 108.2 904 1274

Previously, colour ring r-2.= was used in nest M14, but that chick died. Data for this nest:

Date: Egg code Height (mm)  Width (mm) Comments Metal NLA Colour ring Wing (mm) Head+ bill (mm) Mass (gr)
29-4-2022   3 eggs
20-5-2022 3 pulli in nest 5623563 Red 2.= 63.1 175
5623564 Red 2.+ 62.2 155
5623565 Red 3.A 56.6 124