Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
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Project Info
Location Lelystad
Location De Kreupel
2019 Lelystad
2020 Lelystad
2021 Lelystad
Coded nests Lelystad
2020 De Kreupel
2021 De Kreupel
Coded nests De Kreupel
All ring codes 2020
All ring codes 2021
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 |
Cachinnans x argenteus - nest Lelystad 006
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 006 positioned on artificial breakwater 1 at T-split. Location is nest PLDP - 2020 (in 2021, PLDP moved to nest PESV).
In 2023 location used by mixed pair Caspian Gull & Herring Gull.
- Certainty on ID in 2021, breeders are male Caspian Gull cachinnans and female Herring Gull argenteus.
- Certainty on ID in 2023, breeders are male Caspian Gull cachinnans and female Herring Gull argenteus.
location |
April 16th, 2021: male cach & female teus. |
May 6th, 2021: male cach & female teus. |
April 16th, 2021: male cach & female teus. |
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April 27th, 2023. Caspian x Herring nest. |
April 27th, 2023. Caspian x Herring nest. |
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April 27th, 2023. Caspian "almost thayeri P10". |
April 27th, 2023. Caspian "almost thayeri P10". |
April 27th, 2023. Caspian "almost thayeri P10". |
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pulli |
May 28th, 2021: pullus, likely wrong nest. |
June 8th, 2021: too many cachinnans! |
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Visits and data.
date: |
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16-04-2021 |
Two adult at nest, photographed. Nest without eggs. Many Spoonbills breeding here, hampering visits in future. |
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24-04-2021 |
Correction on flag code. Now labeled "6". Nest abandoned, no eggs? |
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26-04-2021 |
No visit, Camilla is trapping a Spoonbill. |
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06-05-2021 |
egg no: |
width (mm) |
length (mm) |
volume (cm3): |
water test on May 6th: |
3 eggs in nest |
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A egg |
49,2 |
68,7 |
83,73 |
25 - tip at bottom |
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B egg |
50,7 |
71,7 |
92,80 |
30 - tip at bottom |
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C egg |
51,9 |
71,5 |
96,97 |
55 - tip at bottom |
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sum nest: |
273,50 |
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15-05-2021 |
2 eggs in nest. Nest located at 'the flat stone' in dense, inaccessible Blackberry complex. |
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28-05-2021 |
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metal |
tibia |
mass (gr) |
head + bill (mm) |
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pullus |
.5559419 |
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Chick is 1 day old. Only metal ringed. No certianty about species. |
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1 egg: just hatching. |
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In retrospect: this nest was situated 'too high' at dam 1, likely different nest. Hybrid nest is situated at flat stone, lower and central at dam (see May 15th). |
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08-06-2021 |
Sitiuation not clear: several cachinnans and argenteus here guarding 3 large chicks. Favorite place for chicks at the blocks near waterfront, below Blackberry complex. |
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egg sizes & volume 2023 |
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SPECIES |
NEST |
A_length |
A_width |
A_volume |
B_length |
B_width |
B_volume |
C_length |
C_width |
C_volume |
TOTAL NEST: |
known parents? |
cach x teus |
6-2023 |
71,2 |
49,7 |
88,55 |
69,7 |
49,2 |
84,95 |
69,7 |
47,4 |
78,85 |
252,35 |
New nest. |
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6-2023 |
OLD LOCATION PESV |
dam: |
dam 1 T-split |
location: |
old nest yPESV, N of Elder bush (Vlierstruik), visible from West. |
breeders: |
cach x teus |
OBSERVATIONS: |
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09-04-2023 |
1 adult |
Guarding cach type with yellow legs. |
27-04-2023 |
adult: |
1x teus and 1x cach at nest location. Quickly returning. Should check for nest here. |
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Check cach from pictures 2022: this is a known bird (the 'almost thayeri'.)… |
13-05-2023 |
adult: |
again, the cach with limpy left leg. |
27-05-2023 |
nest: |
3 eggs measured. |
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