Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
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Project Info
International trend
National trend
Site characteristics
Breeding biology
Fecundity
Food resources
Nonbreeding season
Breeding species
Hybrid scores
Ring codes
Future
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 231
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 231 positioned on dam 2 - west: low on blocks just 5 meters southwest of nests 203 & 204, and right beneath nest 229.
- ID uncertain in 2022: one parent is cachinnans, other parent unknown.
- ID certain in 2023: both parents are cachinnans. Nest aka "nest with orange football".
- ID in 2024: both parents are same cachinnans as in 2023. Female trapped in 2024, now g-A|C.
location |
April 29th, 2022: location of nest. |
April 29th, 2022: location of nest. |
April 29th, 2022: 2 eggs. |
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partner 1 |
May 1st, 2022 adult cachinnans at nest. |
April 21st, 2024: location of nest. |
April 21st, 2024: full clutch, with 3 eggs. |
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partner 1 |
May 1st, 2022 adult cachinnans. |
May 1st, 2022 adult cachinnans. |
May 1st, 2022 adult cachinnans. |
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partner 1 |
April 27th, 2023 adult female cachinnans. |
April 27th, 2023 adult female cachinnans. |
April 27th, 2023 adult female cachinnans. |
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partner 1 |
April 23rd, 2024: female cachinnans. |
April 23rd, 2024: female cachinnans. |
April 26th, 2024: female cachinnans, now g-A|C. |
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partner 2 |
May 13th, 2023 male cachinnans type (or hybrid). |
May 13th, 2023 male cachinnans type (or hybrid). |
May 13th, 2023 male cachinnans type (or hybrid). |
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partner 2 |
April 23rd, 2024: male cachinnans-type. |
April 23rd, 2024: male cachinnans-type. |
April 23rd, 2024: male cachinnans-type. |
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pullus |
July 18th, 2023: fledged r[7.4]. |
July 18th, 2023: fledged r[7.5]. |
December 6th, 2023: fledged r[7.6]. |
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pullus |
June 18th, 2024: chick g-B|G. |
June 18th, 2024: chick g-B|H. |
May 7th, 2024: chick g-B|J. |
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prey |
May 22nd, 2022: prey is fish. |
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Visits and data.
nest 231-2022 |
date A egg: April 14 |
hatch A egg: May 14 |
ring chicks: May 22 |
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29-04-22 |
2 eggs |
A egg |
67,8 |
49,7 |
tip bottom - 90 gr |
5 mtr S of nests 203/204, low on blocks |
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B egg |
60,8 |
48,5 |
tip bottom - 90 gr |
red spot + code sprayed near nest |
01-05-22 |
adult cachinnans at nest. |
17-05-22 |
mixed pair? Possibly cachinnans and argenteus at nest? |
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1 egg present, and likely 1 chick (but not found in vegetation). |
22-05-22 |
1 egg is infertile |
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no chicks found, but fish prey at nest indicative of offspring. |
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prey: perch and roach. |
17-06-22 |
adult cachinnans with 1x unringed chick (P7 fully grown / can not fly yet). |
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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 |
231-2023 |
66,7 |
50,5 |
85,65 |
66,5 |
51,9 |
90,19 |
66,1 |
52 |
89,99 |
265,83 |
No |
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ring pulli: |
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laying A egg: |
hatch A egg |
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catch: |
date: |
metal: |
darvic: |
mass: |
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Pullus |
11-5-2023 |
5.556.451 |
r-7.4 |
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very small chick |
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Pullus |
11-5-2023 |
5.556.452 |
r-7.5 |
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small chick |
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Pullus |
11-5-2023 |
5.556.453 |
r-7.6 |
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very small chick |
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Pullus |
18-5-2023 |
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r-74 |
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present |
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Pullus |
27-5-2023 |
5.556.452 |
r-75 |
730 |
wing: |
head+bill: |
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Pullus |
18-6-2023 |
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r-74 |
1041 |
338 |
118,4 |
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231-2023 |
nest 'orange football'. |
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dam: |
dam 2 west |
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location: |
5 mtr south of 203/204. Near waterfront |
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breeders: |
cach x cach |
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OBSERVATIONS: |
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04-04-2023 |
adult: |
1 cach at nest location. |
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09-04-2023 |
nest: |
nest empty |
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Water test: |
26-04-2023 |
nest: |
3 eggs. Measured & water test: |
A |
90 - tip bottom |
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B |
90 - tip bottom |
27-04-2023 |
adult: |
breeding female cach |
C |
80 - tip bottom |
11-05-2023 |
pulli |
3 chick ringed |
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13-05-2023 |
adult: |
2x cach adults, 1 chick in nest, legs not visible. |
18-05-2023 |
nest: |
R-74 present, other not found |
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18-06-2023 |
pulli |
r-74, r-75 & r-76 swimming together, only r-74 trapped & measured. Fledged: 3 chicks. |
25-06-2023 |
pulli |
r-74, r-75 and r-76. All 3 chicks fledged. |
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: |
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cach |
cach |
70 |
52 |
95,30 |
67,9 |
50,9 |
88,57 |
68 |
51,5 |
90,81 |
274,68 |
231-2024 |
# eggs |
A-egg |
hatch |
# ringed chicks |
# all chicks |
# fledged chicks |
comments |
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3 |
4-4-2024 |
2-5-2024 |
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dam: |
dam 2 west |
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location: |
was nest 'orange football' 2023, |
parents? |
Same as 2023. |
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ring pulli: |
6-May |
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date |
darvic |
metal |
location / nest# |
species |
sexe |
age |
wing |
mass |
head+ bill |
bill |
tarsus |
gonys |
greyscale |
26-04-2024 |
g-A|C |
.5625297 |
voetbal (231) |
PONT |
F |
>4CY |
439 |
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121,0 |
53,8 |
69,1 |
17,9 |
6 |
07-05-2024 |
g-B|G |
.5631154 |
231 football |
PONT |
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1CY |
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90 |
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07-05-2024 |
g-B|H |
.5631155 |
231 football |
PONT |
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1CY |
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147 |
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07-05-2024 |
g-B|J |
.5631156 |
231 football |
PONT |
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1CY |
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136 |
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OBSERVATIONS: |
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21-04-2024 |
eggs: |
3 eggs, measured. |
26-04-2024 |
adult: |
adult female trapped at nest, now g-A|C. |
02-05-2024 |
eggs: |
2 eggs, 1x hatched halfway. |
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chicks: |
1 chick, hatched this morning. |
07-05-2024 |
chicks: |
3x ringed. |
04-06-2024 |
pullus: |
g-B|J dead, >7 days. Rings removed. |
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adult: |
2x, both parents in territory. |
18-06-2024 |
chick: |
CONTROLL: g-B|G at water, g-B|H at blocks near territory. |
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