Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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Nests at Lelystad 2022
nest y-PNED
nest y-PHSV / r-CG
nest y-P:U60
nest y-X56A
nest y-X71A
nest y-X540
nest y-XCHP
nest w-327:U
nest n-F|N
nest r-6A
nest r-6B
nest r-6C
nest r-CS
nest r-FC
nest w-8Z
nest zy-MT
nest 003
nest 011
nest 012
nest 014
nest 015
nest 017
nest 017B
nest 018
nest 019
nest 021
nest 026
nest 034
nest 035
nest 038
nest 040
nest 044
nest 046
nest 048
nest 053
nest 055
nest 058
nest 060
nest 061Z
nest 062
nest 063
nest 107Z
nest 109
nest 111
nest 112
nest 113
nest 117Z
nest 118Z
nest 123Z
nest 124Z
nest 125Z
nest 126Z
nest 127Z
nest 128Z
nest 129Z
nest 131Z
nest 132 YLG
nest 133
nest 134
nest 135
nest 136
nest 137
nest 138
nest 139
nest 143Z
nest 203
nest 204
nest 207
nest 222Z
nest 227
nest 228Z
nest 229
nest 230Z
nest 231
nest 240Z
nest 244
nest 245Z

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

Cachinnans - nest Lelystad zy-M.T (nest 054)

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).
• In 2021 nest 054 positioned high on artificial breakwater dam 2, nest between large blocks.
• In 2022 nest 54 at same location.
• ID in 2021 certain: female Yellow-legged Gull michahellis hybrid zy-MT is HY=2013 pullus from Wijk bij Duurstede colony, offspring from Herring x Yellow-legged Gull.
  Male of nest 054 is Herring Gull. Offspring from nest 054 will be "Herring Gull backcross F2-hybrids".
• ID in 2022: again present zy-MT and a Herring Gull.
• Nest positioned "at the end of the large log" on top of dam. Tip of log painted red with spray. Partners were obvious, well visible on look-out many visits.

location	Nest between blocks April 24, 2021.	Eggs April 24th, 2021: 3 eggs clutch.	May 13th, 2021.
	Nest April 29th, 2022.	Eggs April 29th, 2022: 3 eggs clutch.	May 4th, 2022: situation.
partner 1	March 30th, 2021: female zy-MT is hybrid micha-type.	April 24th, 2021: female zy-MT is hybrid micha-type.	March 30th, 2021: female zy-MT is hybrid micha-type.
partner 2	April 24th, 2021: partner is Herring Gull.	April 24th, 2021: two partners near nest.	May 13th, 2021: Herring Gull.
food	May 30th, 2022: Roach (?)	.	.
pullus	May 28th, 2021 pullus b[S|Y] from neighbour.	June 26th, 2021 Lesser Black-backed Gull b[S|Y].	June 26th, 2021 Lesser Black-backed Gull b[S|Y].
pullus	May 28th, 2021 pullus b[S|X].	June 26th, 2021 pullus r[F.H].	May 30th, 2022 pullus r[6.T].

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