Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Leon Kelder
Mars Muusse

Home

Cachinnans - nest Lelystad PESV (2020: 006)

General remarks:

  • Eggs: Volume measured by Stonehouse (1964) and Spaans & Spaans (1975), which make comparison possible with data from Texel (Camphuysen pers comm 16.04.2020).
  • Nest 006 positioned in dense Blackberry vegetation, in vicinity of Spoonbill nests, on artificial breakwater 1 at T-split.
  • Certainty on ID in 2020, breeders are Caspian Gull cachinnans, one partner is ringed yellow PESV 10CY, and one unringed partner. Neighbours of yellow PLDP (nest 005 in 2020).
  • In 2021 nest location taken by other pair, which are Caspian Gulls cachinnans. y[PESV] not present in colony in 2021.
location Nest in vegetation 2020. Nest location on April 15th, 2020.  
   
eggs Eggs April 15th, 2020: 3 eggs clutch. Eggs April 27th, 2020: 3 eggs clutch.  
   
partner 1 May 7th, 2020: cachinnans y[PESV]. April 15th, 2020: cachinnans y[PESV]. .
   
partner 2 May 7th, 2020: cachinnans unringed. May 7th, 2020: cachinnans unringed. May 7th, 2020: cachinnans unringed.
 
pulli May 21st, 2020: pullus ringed n[F|1]. May 21st, 2020: pullus ringed n[F|7]. June 2nd, 2020: n[F|1] & n[F|7] & unringed pullus.
 

Visits and data.

datum: egg no: width (mm) length (mm) volume (cm3):   
15-04-2020 A 51 71,8 94,03 3 eggs in nest.
15-04-2020 B 51,4 70,9 94,31
15-04-2020 C 51,1 71,2 93,61
  sum nest: 281,95
07-05-2020 pullus   Nest with 3 small chicks (5 days old, 1 day old, 1 day old).
   
21-05-2020 pullus n[F|1] 2 pulli ringed.
21-05-2020 pullus n[F|7] 2 pulli ringed. n[F|7] ringed beneath nest near water.
   
02-06-2020 pullus 3 juveniles together, largest chick unringed swimming around.
02-06-2020 pullus 3 juveniles together, including n[F|1].
02-06-2020 pullus 3 juveniles together, including n[F|7].