Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
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Breeding biology
Fecundity
Food resources
Nonbreeding season
Breeding species
Hybrid scores
Ring codes
Future
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 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 111
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 111 positioned on dam 1, just east of bend, 40 mtr west of PNED.
- ID certain in 2022: parents are male Caspian Gull type (short tongue on P10 may indicate hybrid, otherwise nice cachinnans) and female Caspian Gull.
- Nest 111-2024 positioned on artificial breakwater 1 east, same as 2023. Location is "Beauty nest" with blue jerrycan, 25 mtr E of P9R0, top of dam, visible from N.
- ID certain in 2023: both female and male Caspian Gull are the same as 2022.
- ID certain in 2024: both female and male are Caspian Gull.
location |
April 19th, 2022: nest location. |
May 1st, 2022: nest location with male. |
May 13th, 2023: both partners are Caspian Gulls. |
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April 21st, 2024: Blue jerrycan, top of dam 1. |
April 21st, 2024: Beauty nest 111. |
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nest |
April 15th, 2022: 3 eggs. |
April 26th, 2023: 3 eggs. |
April 21st, 2024: 2 eggs. Never 3 eggs in 2024. |
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partner 1 |
April 27th, 2022: female 1 is cachinnans. |
April 27th, 2022: female 1 is cachinnans. |
May 13th, 2023: female Caspian Gull. |
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partner 1 |
May 07 2024: female Caspian Gull. |
May 07 2024: female Caspian Gull. |
May 07 2024: female Caspian Gull. |
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partner 2 |
May 1st, 2022: partner 2 is cachinnans type. |
April 27th, 2022: partner 2 is cachinnans type. |
May 13th, 2023: male Caspian Gull. |
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partner 2 |
April 21st, 2024: male Caspian Gull (broad band P5). |
May 07 2024: male Caspian Gull. |
May 07 2024: male Caspian Gull. |
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pullus |
May 9th, 2022: pullus r[C.H]. |
May 9th, 2022: pullus r[C.J]. |
July 17th, 2022: juvenile r[C.J]. |
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pullus |
July 18th, 2023: juvenile g[7|T]. |
June 18th, 2023: juvenile g[8|V]. |
June 18th, 2023: juvenile g[8|X]. |
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pullus |
May 14 2024: g-B|2. |
May 14 2024: g-B|3. |
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Visits and data 2022 for nest 111:
Estimation egg laying: A-egg = April 3 2022. Estimating hatching = May 1 2022.
date: |
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egg no: |
width (mm): |
length (mm): |
volume (cm3): |
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15-04-2022 |
A |
53,2 |
71,7 |
-- |
90 - tip bottom |
3 eggs |
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B |
52,6 |
72,5 |
-- |
60 - tip bottom |
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C |
50,5 |
70,8 |
-- |
70 - tip bottom |
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sum nest: |
-- |
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egg no: |
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3 eggs, 1 adult has short white tongue on P10: hybrid? |
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27-04-2022 |
A |
float - 1 mm |
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B |
float - 1 mm |
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C |
float - 3 mm |
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Cach and cachinnans type at nest. |
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04-05-2022 |
Cachinnans type male at nest. |
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metal |
darvic |
mass |
H+B |
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09-05-2022 |
.5625058 |
r-C.H |
-- |
-- |
09-05-2022 |
.5625059 |
r-C.J |
-- |
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17-05-2022 |
.5625058 |
r-C.H |
416 |
81,8 |
21-05-2022 |
r-CH & r-CJ and another unringed chick swimming and flying between the dams. |
28-06-2022 |
r-CH & r-CJ photos. |
17-07-2022 |
r-CH & r-CJ photos. |
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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 cach |
111-2023 |
70,7 |
51,5 |
94,41 |
70,5 |
52,6 |
98,21 |
69,7 |
50,1 |
88,09 |
280,71 |
same as 2022 |
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ring pulli: May 15. |
laying A egg: April 12. |
hatch A egg: May 10. |
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catch: |
date: |
metal: |
darvic: |
mass: |
wing: |
head+bill: |
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Pullus |
18-5-2023 |
5.556.409 |
g-7|T |
77 |
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52,5 |
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Pullus |
27-5-2023 |
5.556.409 |
g-7|T |
326 |
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Pullus |
27-5-2023 |
5.625.266 |
g-8|V |
253 |
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Pullus |
27-5-2023 |
5.625.269 |
g-8|X |
326 |
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Pullus |
18-6-2023 |
5.625.269 |
g-8|X |
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fledged |
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Pullus |
18-6-2023 |
5.625.266 |
g-8|V |
810 |
262 |
109,1 |
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Pullus |
18-6-2023 |
5.556.409 |
g-7|T |
809 |
264 |
117,1 |
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Pullus |
25-6-2023 |
5.625.269 |
g-8|X |
938 |
290 |
117,2 |
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111-2023 |
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dam: |
dam 1 east |
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location: |
Top of dam. On S-side: red/white traffic sign, nest 111 is just west of it. Same nest as 111-2022 |
breeders: |
cach x cach |
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OBSERVATIONS: |
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09-04-2023 |
adult: |
Unringed cach present at location. So search for nest today. |
26-04-2023 |
adult: |
Unringed cach present at location. |
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nest: |
Blue jerrycan, old red spot visible. Code 111 sprayed on block N. 10 m W of 112. LBBG 6 m N of 111 |
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eggs: |
3x egg, measured. |
A |
60 - tip bottom |
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B |
60 - tip bottom |
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C |
40 - tip bottom |
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11-05-2023 |
eggs: |
3 eggs |
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18-05-2023 |
pulli |
1 chick ringed, 1 chick just hatched (still wet), 1 egg |
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27-05-2023 |
pulli |
3x chicks measured & ringed. |
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18-06-2023 |
pulli |
3x chicks fledged: g-7|T, g-8|V, g-8|X. |
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25-06-2023 |
pulli |
g-8|X and g-8|V present |
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Visits and data 2024.
NEST code |
parent 1 |
parent 2 |
A_length |
A_width |
A_volume |
B_length |
B_width |
B_volume |
C_length |
C_width |
C_volume |
TOTAL NEST: |
111-2024 |
cach |
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71,6 |
51,2 |
94,50 |
71 |
51,3 |
94,08 |
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# eggs |
A-egg |
hatch |
# ringed chicks |
# all chicks |
# fledged chicks |
comments |
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2 |
15-4-2024 |
13-5-2024 |
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dam: |
dam 1 east |
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location: |
Beauty nest with blue jerrycan, 25 mtr E of P9R0, top of dam, visible from N. |
parents? |
New? |
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ring pulli: |
17-May |
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date |
darvic |
metal |
location / nest# |
species |
sexe |
age |
wing |
mass |
head+ bill |
bill |
tarsus |
gonys |
greyscale |
14-05-2024 |
g-B|2 |
.5631184 |
nest 111 |
PONT |
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1CY |
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68 |
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14-05-2024 |
g-B|3 |
.5631185 |
nest 111 |
PONT |
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1CY |
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85 |
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OBSERVATIONS: |
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21-04-2024 |
eggs: |
2 eggs, measured. |
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adult: |
Caspian Gull incubating. |
26-04-2024 |
eggs: |
still 2 eggs only. |
07-05-2024 |
eggs: |
2x. |
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adults: |
both are Caspian Gull. |
14-05-2024 |
chicks: |
2x ringed. |
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