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Analysis
Phenology
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Totals (date)
Totals (species)
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Totals Bloemendaal aan Zee 2026
Year
all years
2026
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991
1990
1989
1988
1987
1986
1985
1984
1978
1976
1975
Period
january
february
march
april
may
june
july
august
september
october
november
december
all months
spring
autumn
jan, feb & mar
feb, mar & apr
mar, apr & may
apr, may & jun
may, jun & jul
jun, jul & aug
jul, aug & sep
aug, sep & oct
sep, oct & nov
oct, nov & dec
jan & feb
feb & mar
mar & apr
apr & may
may & jun
jun & jul
jul & aug
aug & sep
sep & oct
oct & nov
nov & dec
dec & jan
count-field
both directions
number N
number S
Also present
Species
Jan
Totals
S
N
Maximum
Presence
(%)
Presence
(days)
First
Last
1.
Dark-bellied Brent Goose
18
18
18
0
18 (
10 Jan
)
100
1
10 Jan
10 Jan
2.
Feral Mallard
1
1
1
0
1 (
10 Jan
)
100
1
10 Jan
10 Jan
3.
Shelduck
98
98
98
0
98 (
10 Jan
)
100
1
10 Jan
10 Jan
4.
Shoveler
6
6
6
0
6 (
10 Jan
)
100
1
10 Jan
10 Jan
5.
Gadwall
13
13
13
0
13 (
10 Jan
)
100
1
10 Jan
10 Jan
6.
Wigeon
751
751
717
34
751 (
10 Jan
)
100
1
10 Jan
10 Jan
7.
Mallard
62
62
62
0
62 (
10 Jan
)
100
1
10 Jan
10 Jan
8.
Pintail
7
7
7
0
7 (
10 Jan
)
100
1
10 Jan
10 Jan
9.
Teal
7
7
7
0
7 (
10 Jan
)
100
1
10 Jan
10 Jan
10.
duck sp.
2
2
0
2
2 (
10 Jan
)
100
1
10 Jan
10 Jan
11.
Pochard
19
19
19
0
19 (
10 Jan
)
100
1
10 Jan
10 Jan
12.
Tufted Duck
2
2
2
0
2 (
10 Jan
)
100
1
10 Jan
10 Jan
13.
Velvet Scoter
2
2
1
1
2 (
10 Jan
)
100
1
10 Jan
10 Jan
14.
Common Scoter
96
96
78
18
96 (
10 Jan
)
100
1
10 Jan
10 Jan
15.
Goldeneye
2
2
1
1
2 (
10 Jan
)
100
1
10 Jan
10 Jan
16.
Red-breasted Merganser
4
4
4
0
4 (
10 Jan
)
100
1
10 Jan
10 Jan
17.
Golden Plover
1
1
1
0
1 (
10 Jan
)
100
1
10 Jan
10 Jan
18.
Lapwing
187
187
187
0
187 (
10 Jan
)
100
1
10 Jan
10 Jan
19.
Curlew
49
49
49
0
49 (
10 Jan
)
100
1
10 Jan
10 Jan
20.
Dunlin
1
1
1
0
1 (
10 Jan
)
100
1
10 Jan
10 Jan
21.
Purple Sandpiper
1
1
1
0
1 (
10 Jan
)
100
1
10 Jan
10 Jan
22.
Kittiwake
7
7
5
2
7 (
10 Jan
)
100
1
10 Jan
10 Jan
23.
Black-headed Gull
258
258
258
0
258 (
10 Jan
)
100
1
10 Jan
10 Jan
24.
Common Gull
518
518
518
0
518 (
10 Jan
)
100
1
10 Jan
10 Jan
25.
Herring Gull
67
67
56
11
67 (
10 Jan
)
100
1
10 Jan
10 Jan
26.
Great Black-backed Gull
30
30
24
6
30 (
10 Jan
)
100
1
10 Jan
10 Jan
27.
Red-throated Diver
85
85
85
0
85 (
10 Jan
)
100
1
10 Jan
10 Jan
28.
diver sp.
22
22
22
0
22 (
10 Jan
)
100
1
10 Jan
10 Jan
29.
Gannet
40
40
8
32
40 (
10 Jan
)
100
1
10 Jan
10 Jan
30.
Cormorant
45
45
34
11
45 (
10 Jan
)
100
1
10 Jan
10 Jan
Species
Jan
Totals
S
N
Maximum
Presence
(%)
Presence
(days)
First
Last
31.
Great White Egret
3
3
3
0
3 (
10 Jan
)
100
1
10 Jan
10 Jan
32.
Grey Heron
4
4
4
0
4 (
10 Jan
)
100
1
10 Jan
10 Jan
33.
Skylark
5
5
5
0
5 (
10 Jan
)
100
1
10 Jan
10 Jan
34.
Song Thrush
1
1
1
0
1 (
10 Jan
)
100
1
10 Jan
10 Jan
Other species
Species
Jan
Totals
S
N
Maximum
Presence
(%)
Presence
(days)
First
Last
1.
Harbour Porpoise
1
1
0
1
1 (
10 Jan
)
100
1
10 Jan
10 Jan
Species
Jan
Totals
S
N
Maximum
Presence
(%)
Presence
(days)
First
Last
Totals
2415
2415
2296
119
100
1
Observation hours
2:30
2:30
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