Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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

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Cachinnans - nest De Kreupel D03 20

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 on island "D", positioned in NW corner.
  • On June 19th, four large juveniles present at this spot, one individual (p[FF] maybe?) most certainly from another nest. None of the birds traced back to the parents.
pullus June 12th, 2020 pullus p[FD].      
   
   
juveniles June 19th, 2020 pullus p[FD]. June 19th, 2020 pullus p[FE]. June 19th, 2020 pullus p[FF]. June 19th, 2020 pullus p[FH].
 
 
 
 
 

Visits and data.

date:     WING: HEAD + BILL: BILL: WEIGHT: TARSUS:
12-6-2020 pullus NLA 5.545.454 & p[FD] 226 109.9 45.8 957 --
               
19-6-2020 pullus NLA 5.545.454 & p[FD] 290 115.3 968 78.4
19-6-2020 pullus NLA 5.545.490 & p[FE] 294 119.5 1212 78.2
19-6-2020 pullus NLA 5.545.491 & p[FH] 260 109.7 939 69.7