Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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Lelystad 2020:
nest 001
nest 002 yPNED
nest 003
nest 005 yPLDP
nest 006 yPESV
nest 008 gXLDT
nest 009
nest 011
nest 012
nest 013
nest 014
nest 015
nest 016
nest 017
nest 018
nest 021
nest 025
nest 027
nest 028
nest 029
nest 031
nest 032
nest 033
nest 034
nest 035
nest 036
nest 037
nest 038
nest 039
pair A
pair B

Lelystad 2021
nest y-PNED
nest y-PLDP
nest y-PHSV
nest y-P:A02
nest y-P:U60
nest zy-MT
nest r-FB
nest r-FC
nest 001
nest 003
nest 006
nest 011
nest 012
nest 013
nest 014
nest 015
nest 016B
nest 017
nest 018
nest 019
nest 021
nest 034
nest 035
nest 038
nest 040
nest 041
nest 042
nest 044
nest 045
nest 046
nest 047
nest 048
nest 053
nest 055
nest 056
nest 058
nest 060
nest 062
nest 063
nest 065
nest 066
nest 067
nest 072

Lelystad 2023:
nest y-PNED
nest y-P:U60
nest y-X56A
nest y-X71A
nest y-X60J
nest y-XCHP
nest w-327:U
nest n-F|6
nest n-F|8
nest n-F|+
nest n-F|N
nest r-6.B
nest r-7.P
nest r-C.G
nest w-8Z
nest 003
nest 006
nest 013
nest 014
nest 015
nest 017
nest 017B
nest 018
nest 019
nest 021
nest 026
nest 033
nest 034
nest 035
nest 038
nest 040
nest 044
nest 046
nest 048
nest 053
nest 055
nest 060
nest 061Z
nest 062
nest 063
nest 107Z
nest 108
nest 109
nest 111
nest 112
nest 127Z
nest 131Z
nest 132 YLG
nest 135
nest 139
nest 147Z
nest 163
nest 167
nest 168
nest 204
nest 206
nest 207
nest 223
nest 227
nest 230Z
nest 231
nest 244Z
nest 245Z
nest 248
nest 251
nest 252
nest 253
nest 254
nest 255Z
nest 256Z
nest 262

Cachinnans - nest Lelystad 013

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 013 positioned on top of breakwater 2. Behind nest 18, just and a few meters eastwards.
• By May 2020, area also occupied by Little Egrets and Spoonbills, therefore no controls after May 1st.
• In 2021, nest was added to control list quite late, 1st week of May.
• Uncertainty on ID in 2020, one parent is Caspian Gull cachinnans type, or just within hybrid zone. Other parent not photographed.
• Uncertainty on ID in 2021, one parent is probably same bird, again Caspian Gull cachinnans type or just within hybrid zone. Possible partner may be sub-adult Herring Gull type.
• In 2023: late nest with eggs found on May 27th, 2023. Not monitored except for this date. No clue on breeders, but note egg dimensions.

location	April 15th, 2020: 1 egg clutch.	April 27th, 2020: 3 eggs clutch.	.
	May 27th, 2023: old 13 location.	May 27th, 2023: 3 eggs clutch.	May 27th, 2023: old 13 location.
partner 1	May 7th, 2020.	May 7th, 2020.	May 7th, 2020.
partner 1	April 26th, 2021: possible bird for nest 13.	May 6th, 2021.	May 6th, 2021.
partner 2	May 28th, 2021: possible partner nest 13.	May 28th, 2021: possible partner nest 13.	May 28th, 2021: possible partner nest 13.
pullus	May 28th, 2021: pullus b[F|R].	May 28th, 2021: pullus b[F|S].	May 28th, 2021.

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