Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
Caspian Gull cachinnans D|U 1CY, May - June 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder.
Blue tibia ring b[D|U], ringed as pullus Larus cachinnans on May 20 2021 at nest D08 21 in colony De Kreupel, the Netherlands.
ID is uncertain: father is y[X311] Caspian Gull cachinnans ringed as pullus in Germany, mother is unringed Herring Gull argentatus hybrid-type.
below: Caspian Gull cachinnans D|U 1CY, May 20 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder.
below: Caspian Gull cachinnans D|U 1CY, June 11 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder.
| Date: | details: | |||||
| 23-4-2021 | 3 eggs in nest. | egg no: | width (mm): | length (mm): | volume (cm3): | |
| A egg | 53.0 | 75.3 | ||||
| B egg | 51.0 | 73.7 | ||||
| Attempt to trap breeding adult. Failed. | C egg | 52.1 | 78.6 | |||
| 14-5-2021 | 3 eggs in nest. | |||||
| 20-5-2021 | 3 pulli in nest. | metal: | tibia: | mass (gr): | head + bill: | tarsus: |
| Prey: Rounded Goby 2x; Eel 1x. | NLA 5.556.753 | b-D|S | 149 | 61.1 | 35.0 | |
| https://waarneming.nl/observation/214707477/ | NLA 5.556.754 | b-D|T | 108 | 56.3 | 32.8 | |
| NLA 5.556.755 | b-D|U | 163 | 62.3 | 36.2 | ||
| 20-5-2021 | Camera trap near nest: 3 pulli & 2 adults. Caspian Gull cachinnans male y[X311] from Germany & Herring Gull type / hybrid female. | |||||
| 11-6-2021 | 2 chicks near nest. | metal: | tibia: | mass (gr): | head + bill: | wing: |
| https://waarneming.nl/observation/216987545/ | NLA 5.556.753 | b-D|S | 1057 | 110.3 | 240.0 | |
| NLA 5.556.755 | b-D|U | 1130 | 114.1 | 249.0 | ||