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

Caspian Gull cachinnans K.T 1CY, May - June & December 2021, De Kreupel, the Netherlands & Dungeness, UK. Picture: Leon Kelder & Martin Casemore.

Red tibia ring r[K.T] and metal NLA Arnhem 5.556.725, ringed as pullus Larus cachinnans on May 14 2021 at nest L02 in colony De Kreupel, the Netherlands (5247.00 N 513.00 E) - ringer Leon Kelder.
ID is uncertain: one parent is Caspian Gull cachinnans, and one parent is Caspian Gull cachinnans hybrid-type.

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
24-12-2021 Dungeness, Kent, ENGELAND 5.054,00 N 58,00 E colourring read Martin Casemore

below: Caspian Gull cachinnans K.T 1CY, December 24 2021, Dungeness RSPB reserve, Kent, UK. Picture: Martin Casemore.

below: Caspian Gull cachinnans K.T 1CY, June 11 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder.

below: Caspian Gull cachinnans K.T 1CY, June 04 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder.

below: Caspian Gull cachinnans K.T 1CY, May 14 2021, De Kreupel - L, the Netherlands. Picture: Leon Kelder.

Date: details:          
9-4-2021 2 eggs in nest. egg no: width (mm): length (mm): volume (cm3): 
https://waarneming.nl/observation/210431163/ A egg 50.1 70.5
  B egg 50.3 71.5
           
23-4-2021 3 eggs in nest. egg no: width (mm): length (mm): volume (cm3): 
  C egg 50.0 68.6
  A egg 50.5 70.3
Attempt to trap breeding adult. Failed. B egg 50.2 71.4
         
14-5-2021 3 pulli in nest. metal: tibia: mass (gr): head + bill: tarsus:
https://waarneming.nl/observation/214663702/ NLA 5.556.725 Red K.T 319 70.9 44.7
  NLA 5.556.726 Red K.U 272 70.2 42.2
NLA 5.556.727 Red K.V 164 62.2 36.2
           
20-5-2021 3 pulli in nest. metal: tibia: mass (gr): head + bill: wing:
Prey: Perch 1x. NLA 5.556.725 Red K.T 675 88.1 105.5
  https://waarneming.nl/observation/214708986/ NLA 5.556.726 Red K.U 606 85.7 98.0
    NLA 5.556.727 Red K.V 400 77.8 65.5
             
28-5-2021 Camera trap near nest: 3 pulli & 2 unringed adults. Adults are Caspian Gull cachinnans.
  https://waarneming.nl/observation/222467166/          
   
4-6-2021 No chicks present at visit, but 3 chicks today at camera trap!
  Prey: Russian Carp! https://waarneming.nl/observation/216519972/
   
11-6-2021 2 pulli near nest. metal: tibia: mass (gr): head + bill: wing:
Prey: large Eel. NLA 5.556.725 Red K.T 1162 125.0 331.0
  https://waarneming.nl/observation/216987685/ NLA 5.556.726 Red K.U 1214 122.7 317.5