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Totals Castricum aan Zee (zeetrek) 2025
Species
Jan
Totals
S
N
Maximum
Presence
(%)
Presence
(days)
First
Last
1.
Dark-bellied Brent Goose
17
17
0
17
17 (
2 Jan
)
50
1
2 Jan
2 Jan
2.
Shelduck
7
7
0
7
7 (
2 Jan
)
50
1
2 Jan
2 Jan
3.
Wigeon
10
10
0
10
6 (
2 Jan
)
100
2
2 Jan
11 Jan
4.
Teal
8
8
4
4
6 (
11 Jan
)
100
2
2 Jan
11 Jan
5.
Eider
9
9
9
0
7 (
11 Jan
)
100
2
2 Jan
11 Jan
6.
Velvet Scoter
27
27
27
0
27 (
2 Jan
)
50
1
2 Jan
2 Jan
7.
Common Scoter
299
299
227
72
258 (
2 Jan
)
100
2
2 Jan
11 Jan
8.
Smew
1
1
1
0
1 (
11 Jan
)
50
1
11 Jan
11 Jan
9.
Great Crested Grebe
1
1
1
0
1 (
2 Jan
)
50
1
2 Jan
2 Jan
10.
Sanderling
3
3
0
3
3 (
11 Jan
)
50
1
11 Jan
11 Jan
11.
Black-headed Gull
78
78
15
63
70 (
11 Jan
)
100
2
2 Jan
11 Jan
12.
Common Gull
41
41
22
19
29 (
2 Jan
)
100
2
2 Jan
11 Jan
13.
Lesser Black-backed Gull
1
1
1
0
1 (
11 Jan
)
50
1
11 Jan
11 Jan
14.
diver sp.
127
127
93
34
67 (
11 Jan
)
100
2
2 Jan
11 Jan
15.
Gannet
17
17
15
2
13 (
2 Jan
)
100
2
2 Jan
11 Jan
16.
Snow Bunting
1
1
1
0
1 (
11 Jan
)
50
1
11 Jan
11 Jan
Other species
Species
Jan
Totals
S
N
Maximum
Presence
(%)
Presence
(days)
First
Last
1.
Harbour Porpoise
1
1
1
0
1 (
11 Jan
)
50
1
11 Jan
11 Jan
Species
Jan
Totals
S
N
Maximum
Presence
(%)
Presence
(days)
First
Last
Totals
648
648
417
231
100
2
Observation hours
3:30
3:30
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