| Coordinator: Albert de Jong
 Merijn Loeve
 Roland-Jan Buijs
 Thijs Horst
 Leon Kelder
 Mars Muusse
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 Nests at De Kreupel 2020nest  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 2021nest  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
 |  Herring Gull  argenteus  5.E  1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.Red  tibia  ring r[5.E] and metal NLA 5.625.103, ringed as pullus Larus argentatus at nest 63 on May 17 2022 in colony Lelystad, the Netherlands. Ringer: Herman Bouman.ID for nest 063 uncertain in 2022,   one bird is  probably sub-adult Herring Gull.
 Visits and data 2022: Estimation egg laying: A-egg = April 17 2022. Estimating hatching = May 14 2022.
 
        
        
        
        
        
        
          | date: |  |  |  |  |  |  |  |  
          | 15-04-2022 | adult Herring Gull near empty nest. |  |  
          |  |  |  |  |  |  |  |  |  
          | 19-04-2022 | adult Herring Gull near  nest with 2 eggs. |  |  
          |  |  |  |  |  |  |  |  |  
          |  | egg no: | width (mm): | length (mm): | volume (cm3): |  |  |  |  
          | 27-04-2022 | A | 51,4 | 71,7 | -- | 90 - tip bottom | 2 eggs |  |  
          |  | B | 51 | 70,6 | -- | 90 - tip bottom |  |  |  
          |  |  |  | sum nest: | -- |  |  |  |  
          |  |  |  |  |  |  |  
          | 01-05-2022 | Herring Gull sub-adult (5CY) guarding at nest. |  
          |  |  |  
          | 04-05-2022 | still 2 eggs; 3rd egg not likely. 5CY Herring Gull = partner 1. |  
          |  |  |  
          | 09-05-2022 | 2 eggs. |  
          |  |  |  
          | 17-05-2022 | 2 chicks |  
          |  | metal | darvic | mass | H+B | wing |  |  |  
          | 17-05-2022 | .5625102 | r-5.B | 108 | -- | -- | . |  
          | 17-05-2022 | .5625103 | r-5.E | 91 | -- | -- | . |  
          |  |  |  
          | 30-05-2022 | 2 chicks |  
          |  | metal | darvic | mass | H+B | wing | bill |  |  
          | 30-05-2022 | .5625102 | r-5.B | 628 | 92,7 | 114 | 34,4 |  
          | 30-05-2022 | .5625103 | r-5.E | 150 | dead in nest |  
          |  |  |  
          | 21-06-2022 | .5625103 | r-5.E | dead in nest |  
          |  |  |  |  |  |  |  |  |  
          |  |  |  |  |  |  |  |  |  r[5.E] argenteus (or hybrid) from nest 63.        Picture: May 30th, 2022.r[5.E] dead in nest on May 30th. Sibling r[5.B] ringed on May 17th and last observation May 30th.
 
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