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 055

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 055 positioned high on artificial breakwater dam 2, nest between large blocks (labeled "nest with yellow jerrycan", neighbour of nest 54 ny-MT).
  • ID in 2021 certain: all the time only one partner present, which is female Caspian Gull.
  • Nest marked with yellow jerrycan rom flotsam and jetsam nearby nest.
location Nest between blocks April 24, 2021. Nest between blocks April 24, 2021 (with Albert de Jong). Eggs April 24th, 2021: 2 eggs clutch.
 
partner 1 April 24th, 2021: partner 1 = female cachinnans. April 24th, 2021: partner 1 = female cachinnans. April 24th, 2021: partner 1 = female cachinnans.
 
partner 1 April 24th, 2021: partner 1 = female cachinnans. . .
     

Visits and data.

date:              
16-4-2021 Nest is empty.    
  egg no: width (mm): length (mm): volume (cm3):  water test on April 24th: laying date:  
24-4-2021 A 48,1 71,5 83,29 45 - tip bottom    
24-4-2021 B 49,4 68,6 84,29 25 - tip bottom  
sum nest: 167,58
26-4-2021 Female Caspian Gull present.  
06-5-2021 Female Caspian Gull present. A-egg with scratches on one side.  
13-5-2021 Female Caspian Gull present. Which is the partner???  
15-5-2021 1 egg warm.  
15-5-2021 1 egg damaged next to nest.  
28-5-2021 1 egg rotten, nesting attempt for 2021 failed?  
26-6-2021 1 egg, 2nd brood is a new attempt.