Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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

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Herring Gull argenteus NLA 5.625.155 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Metal NLA 5.625.155, ringed as pullus Larus argentatus at nest 124Z on May 22 2022 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs ringing team.
ID certain in 2022: both parents are adult Herring Gull argenteus.

Visits and data:
Estimation egg laying: A-egg = April 24 2022. Estimating hatching = May 22 2022.

date:              
  egg no: width (mm): length (mm): volume (cm3):  water test    
27-04-2022 A-egg 46,9 77,2 -- 20 - tip on bottom    
  B-egg 48,5 70,5   0 - tip on bottom  
  C-egg 48,1 72 -- 20 - tip on bottom
sum nest: --
04-05-2022 3 eggs
adult Herring Gull at nest.
09-05-2022 3 eggs
17-05-2022 3 eggs      
22-05-2022   metal darvic mass wing H+B
pullus NLA 5.625.155 --       small, 3 days old.
pullus NLA 5.625.156 --       small, 2 days old.
30-05-2022 adult Herring Gull at nest
02-06-2022 adult Herring Gull at nest
17-06-2022 adult Herring Gull at nest

Two metal ringed birds, no observations since ringing. However: parents remained around the nest for weeks.

below: Herring Gull argenteus NLA 5.625.155 1CY, May 22 2022, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse.