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 De Kreupel L01 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 "L", positioned in centre.
  • On May 8th, 2020 two pulli ringed, no pictures. p[F6] not seen since.
location Nest location, 2 eggs clutch, April 10th, 2020. Chick p[F5], May 21st, 2020.
 
 
   

Visits and data.

date: egg no: width (mm): length (mm): volume (cm3):        comments:  
10-4-2020 A 50,9 74,3 141,48       2 eggs in nest.  
10-4-2020 B 51,2 76,3 150,08      
               
24-4-2020 Attempt to trap parents at nest. Unsuccessful.
      WING: HEAD + BILL: BILL: WEIGHT:  
8-5-2020 pullus NLA 5.545.423 & p[F5] -- 55.1 20.9 128   2 pulli in nest.  
8-5-2020 pullus NLA 5.545.422 & p[F6] -- 53.8 20.1 98      
         
21-5-2020 pullus NLA 5.545.423 & p[F5] 137,0 87.4 34.8 632   No trace of F6.