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

Home

Project Info
International trend
National trend
Site characteristics
Breeding biology
Fecundity
Food resources
Nonbreeding season
Breeding species
Hybrid scores
Ring codes
Future

Nests at De Kreupel 2020
nest r-02P4 20
nest y-X804 20
nest D01 20
nest D02 20
nest D03 20
nest L01 20
nest L02 20
nest L03 20
nest M02 20

Nests at De Kreupel 2021
nest r-02P4 20
nest w-201U 21
nest g-XLHD 21
nest r-KA 21
nest r-KB 21
nest r-KC 21
nest r-KD 21
nest r-KE 21
nest r-KF 21
nest r-KH 21
nest r-KJ 21
nest r-KK 21
nest A01 21
nest C03 21
nest C04 21
nest C06 21
nest D01 21
nest D03 21
nest D05 21
nest D06 21
nest D07 21
nest D08 21
nest E01 21
nest H01 21
nest L01 21
nest L02 21
nest L05 21
nest L06 21
nest L07 21
nest M01 21
nest M04 21
nest M06 21
nest Q01 21

Caspian Gull cachinnans hybrid-type 0.15 (was X712) 8CY, March 03-04 2024, De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Tarsus ring y-X712 & DEH EA204712, ringed as pullus Larus cachinnans on May 31 2017 in a mixed colony at Gräbendorfer See, Germany.
Breeding bird in colony De Kreupel, the Netherlands in season 2021, 2022, 2023.
In 2023, trapped at nest P4, incubating eggs. Rings replaced.
New tarsus ring: y-0.15, ringed as breeding adult Larus cachinnans on April 29 2023 at De Kreupel - nest P4, Holland (5247.00 N 513.00 E). Ringer Kees Camphuysen & Leon Kelder.

Recoveries:

Ring Year Mm Dd Location   Lat Long Observer   NOTES
X712 2017 05 31 Gräbendorfer See, Brandenburg FRG 51,7 14,1 Hiddensee Bird Ringing Centre Ringed as yellow X712, EA 204712
X712 2017 12 04 Lixhe near Visé (Liege) B 50,8 5,7 Hiddensee Bird Ringing Centre Yellow X712
X712 2018 02 17 Lixhe near Visé (Liege) B 50,8 5,7 Hiddensee Bird Ringing Centre Yellow X712
X712 2018 03 03 Lixhe near Visé (Liege) B 50,8 5,7 Hiddensee Bird Ringing Centre Yellow X712
X712 2018 03 25 Neder-over-Heembeek, dump B 50,9 4,4 Hiddensee Bird Ringing Centre Yellow X712
X712 2018 06 23 Haccourt (north of Liège), Belgium B 50,7 5,7 Hiddensee Bird Ringing Centre Yellow X712
X712 2018 07 10 Utrecht (unspecified) NL 52,1 5,1 Hiddensee Bird Ringing Centre Yellow X712
X712 2020 05 20 Berlin-Mitte FRG 52,5 13,5 Hiddensee Bird Ringing Centre Yellow X712
X712 2020 07 31 De Kreupel eiland P NL 52,8 5,2 Leon Kelder Yellow X712
X712 2021 06 24 De Kreupel eiland P NL 52,8 5,2 Leon Kelder Yellow X712
X712 2021 08 06 De Kreupel eiland P NL 52,8 5,2 Leon Kelder Yellow X712
X712 2021 09 03 De Kreupel eiland P NL 52,8 5,2 Leon Kelder Yellow X712
X712 2022 03 04 De Kreupel eiland P NL 52,8 5,2 Leon Kelder Yellow X712
0,15 2023 04 29 De Kreupel eiland P NL 52,8 5,2 C.J. Camphuysen Nest P4 was yellow X712 - fully re-ringed, worn colour ring & metal (!), 5cy feather wrist
0,15 2024 03 03 De Kreupel NL 52,8 5,2 Thijs Horst Gelokt met brood, geen plaats
0,15 2024 03 04 De Kreupel NL 52,8 5,2 Thijs Horst Gelokt met brood, geen plaats

Bird breeding at De Kreupel.
Nest P4-2023 on island P: no data.
Nest P2-2022 on island P. 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)
14-4-2022 A-egg 74.6 52.0 1 egg
13-5-2022 1 wet chick, 1 hatching egg
20-5-2022 2 pulli in nest 5623554 Red 2.1 62.9 158
Caspian Gull y-X712 alarming Red 2.2 70.4 251

below: Caspian Gull cachinnans hybrid-type 0.15 (was X712) 8CY, March 03-04 2024, De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Seems to be female. Note dark markings on greater primary coverts, despite being 8CY bird.
Note broad black medial band on P10.