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Remarkable
Analysis
Phenology
Record counts
Graph
Graph (combo)
Migration pattern (map)
Totals (date)
Totals (species)
Totals (species x migration site)
Totals by year (species)
Observation hours graph
Observation hours
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Totals Dordtse Biesbosch 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
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
Feb
Totals
S
N
Maximum
Presence
(%)
Presence
(days)
First
Last
1.
Barnacle Goose
3719
1621
5340
4700
640
3500 (
5 Jan
)
100
6
5 Jan
27 Feb
2.
Greylag Goose
754
253
1007
910
97
750 (
5 Jan
)
83
5
5 Jan
27 Feb
3.
goose sp.
25
0
25
0
25
25 (
22 Jan
)
17
1
22 Jan
22 Jan
4.
Tundra Bean Goose
10
0
10
0
10
7 (
23 Jan
)
33
2
22 Jan
23 Jan
5.
Eurasian White-fronted Goose
2040
2936
4976
2150
2826
2650 (
25 Feb
)
100
6
5 Jan
27 Feb
6.
Mute Swan
0
3
3
0
3
3 (
26 Feb
)
17
1
26 Feb
26 Feb
7.
Egyptian Goose
0
4
4
0
4
4 (
26 Feb
)
17
1
26 Feb
26 Feb
8.
Shelduck
0
2
2
0
2
2 (
26 Feb
)
17
1
26 Feb
26 Feb
9.
Shoveler
0
9
9
0
9
9 (
26 Feb
)
17
1
26 Feb
26 Feb
10.
Wigeon
0
1
1
0
1
1 (
26 Feb
)
17
1
26 Feb
26 Feb
11.
Goldeneye
1
0
1
0
1
1 (
23 Jan
)
17
1
23 Jan
23 Jan
12.
Stock Dove
2
18
20
0
20
12 (
25 Feb
)
67
4
22 Jan
27 Feb
13.
Woodpigeon
54
409
463
316
147
144 (
26 Feb
)
83
5
22 Jan
27 Feb
14.
Oystercatcher
0
3
3
0
3
3 (
27 Feb
)
17
1
27 Feb
27 Feb
15.
Lapwing
49
373
422
35
387
350 (
25 Feb
)
83
5
5 Jan
26 Feb
16.
Curlew
1
4
5
1
4
4 (
25 Feb
)
33
2
5 Jan
25 Feb
17.
Black-tailed Godwit
0
13
13
0
13
8 (
26 Feb
)
33
2
26 Feb
27 Feb
18.
Snipe
3
3
6
2
4
3 (
27 Feb
)
50
3
5 Jan
27 Feb
19.
Green Sandpiper
1
0
1
0
1
1 (
22 Jan
)
17
1
22 Jan
22 Jan
20.
Redshank
0
4
4
0
4
3 (
26 Feb
)
33
2
25 Feb
26 Feb
21.
Black-headed Gull
43
281
324
35
289
164 (
26 Feb
)
83
5
22 Jan
27 Feb
22.
Common Gull
3
8
11
2
9
8 (
25 Feb
)
50
3
22 Jan
25 Feb
23.
Herring Gull
1
14
15
2
13
10 (
25 Feb
)
67
4
23 Jan
27 Feb
24.
Yellow-legged Gull
0
1
1
0
1
1 (
27 Feb
)
17
1
27 Feb
27 Feb
25.
Great Black-backed Gull
0
1
1
1
0
1 (
27 Feb
)
17
1
27 Feb
27 Feb
26.
Lesser Black-backed Gull
0
28
28
3
25
14 (
26 Feb
)
50
3
25 Feb
27 Feb
27.
Cormorant
26
47
73
61
12
35 (
25 Feb
)
67
4
5 Jan
27 Feb
28.
Spoonbill
0
1
1
0
1
1 (
25 Feb
)
17
1
25 Feb
25 Feb
29.
Little Egret
1
0
1
1
0
1 (
5 Jan
)
17
1
5 Jan
5 Jan
30.
Great White Egret
1
5
6
1
5
5 (
25 Feb
)
33
2
22 Jan
25 Feb
Species
Jan
Feb
Totals
S
N
Maximum
Presence
(%)
Presence
(days)
First
Last
31.
Great Spotted Woodpecker
0
1
1
0
1
1 (
26 Feb
)
17
1
26 Feb
26 Feb
32.
Peregrine
0
1
1
1
0
1 (
26 Feb
)
17
1
26 Feb
26 Feb
33.
Jackdaw
0
32
32
8
24
16 (
25 Feb
)
50
3
25 Feb
27 Feb
34.
Carrion Crow
13
12
25
0
25
12 (
26 Feb
)
50
3
22 Jan
26 Feb
35.
Blue Tit
0
141
141
0
141
140 (
25 Feb
)
33
2
25 Feb
26 Feb
36.
Great Tit
0
15
15
0
15
6 (
25 Feb
)
50
3
25 Feb
27 Feb
37.
Wood Lark
2
0
2
2
0
2 (
5 Jan
)
17
1
5 Jan
5 Jan
38.
Skylark
75
1
76
75
1
75 (
5 Jan
)
33
2
5 Jan
25 Feb
39.
Long-tailed Tit
0
4
4
0
4
4 (
25 Feb
)
17
1
25 Feb
25 Feb
40.
Starling
3
13
16
0
16
7 (
27 Feb
)
50
3
23 Jan
27 Feb
41.
Fieldfare
8
0
8
8
0
8 (
5 Jan
)
17
1
5 Jan
5 Jan
42.
Stonechat
0
1
1
0
1
1 (
25 Feb
)
17
1
25 Feb
25 Feb
43.
White Wagtail
1
3
4
1
3
3 (
26 Feb
)
33
2
5 Jan
26 Feb
44.
Water Pipit
3
2
5
3
2
3 (
5 Jan
)
33
2
5 Jan
25 Feb
45.
Chaffinch
7
48
55
5
50
35 (
26 Feb
)
83
5
5 Jan
27 Feb
46.
Greenfinch
0
4
4
0
4
2 (
26 Feb
)
33
2
26 Feb
27 Feb
47.
Goldfinch
2
0
2
0
2
1 (
22 Jan
)
33
2
22 Jan
23 Jan
48.
Siskin
1
0
1
1
0
1 (
5 Jan
)
17
1
5 Jan
5 Jan
49.
Reed Bunting
0
3
3
0
3
3 (
26 Feb
)
17
1
26 Feb
26 Feb
Species
Jan
Feb
Totals
S
N
Maximum
Presence
(%)
Presence
(days)
First
Last
Totals
6849
6323
13172
8324
4848
100
6
Observation hours
4:00
9:30
13:30
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