The documents provide data from multiple long-term field surveys of the flying squirrel (Pteromys volans) population in various regions of Finland and Russia from 1987-2013. The surveys involved visiting localities and recording the number of sites occupied by flying squirrels. Some surveys also involved capturing and tagging squirrels to obtain data on demographics like number of males, females, adults and juveniles observed each year. The datasets are maintained by researchers at the Finnish Museum of Natural History and the Institute of Forest in Russia and can be used to study the metapopulation dynamics and biodiversity of flying squirrels in the European boreal forest.

1. Metapopulation Research Group
European Boreal Forest Biodiversity (EBFB)
Dataset: Finnish Museum of Natural History - National Survey of Flying Squirrel / Finland
Year
2003
2004
2005
2006
Total
Species:
No# localities
visited
2539
3306
4177
10
10032
No# localities
occupied
371
424
234
1
1030
Area (ha)
22851
29754
37593
90
90288
Pteromys volans
Source/Owner: Ilpo Hanski / Finnish Museum of Natural History
Method: Field survey of pellets

2. Metapopulation Research Group
European Boreal Forest Biodiversity (EBFB)
Dataset: Ilpo Hanski’s Flying Squirrel Survey / Finland
Year
2003
2004
2005
2006
2007
2008
2009
Total
No# localities
visited
248
248
248
250
187
175
160
1516
Species:
No# localities
occupied
119
101
86
100
94
96
92
688
Pteromys volans
Area (ha)
2232
2232
2232
2250
1683
1575
1440
13644
Source/Owner: Ilpo Hanski / Finnish Museum of Natural History
Method: Field survey of pellets

3. Metapopulation Research Group
European Boreal Forest Biodiversity (EBFB)
Dataset: Flying Squirrel survey in Karelia / Russia
Year
2002
2004
2005
2006
2007
2008
Total
No# localities
visited
1
276
447
624
276
90
1714
Species:
No# localities
occupied
0
41
51
108
31
3
234
Pteromys volans
Area (ha)
9
2484
4023
5616
2484
810
15426
Source/Owner: Institute of Forest, Karelian Research Centre,
Russian Academy of Sciences
Method: Field survey of pellets

4. Metapopulation Research Group
European Boreal Forest Biodiversity (EBFB)
Dataset: Flying Squirrel Survey – Highway VT1 – Muurla-Lohja / Finland
Year
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
Total
No# localities visited
81
83
79
79
74
71
72
67
82
75
74
837
Species:
No# localities occupied
57
51
52
49
33
43
38
44
53
43
37
500
Pteromys volans
Source/Owner: to be confirmed
Method: Field survey of pellets

5. Metapopulation Research Group
European Boreal Forest Biodiversity (EBFB)
Dataset: Flying Squirrel Survey – Risto Sulkava / Finland
Year
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
Total
No# localities No# localities
visited
occupied
1
1
70
36
52
28
68
37
68
34
71
28
87
47
91
56
89
58
99
61
104
62
109
70
123
75
96
59
97
54
76
38
105
68
96
51
103
51
99
64
72
46
72
45
69
44
68
37
65
35
59
32
2109
1217
Species:
Pteromys volans
Source/Owner: Risto Sulkava
Method: Field survey

6. Metapopulation Research Group
European Boreal Forest Biodiversity (EBFB)
Dataset: Flying Squirrel Capture Recapture – Ralf Wistbacka – Luoto / Finland
Year
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
Total
No# Box
visited
114
212
210
199
203
205
209
225
243
242
231
217
227
201
174
153
139
136
140
163
3843
Species:
Method:
Add.info:
No# Box
visits
195
437
466
427
399
534
522
525
412
332
359
391
377
289
180
154
160
185
190
229
6763
No#
Visits+FS
33
66
79
77
63
85
110
83
54
60
67
51
69
30
20
22
29
33
38
45
1114
No# FS
No#
No#
No#
No#
No#
No#
recorded Males Females Adults Juveniles Deads Mothers
80
22
31
27
52
1
9
133
63
59
65
67
2
24
145
61
76
74
70
2
20
142
68
61
70
69
3
18
105
55
45
64
39
6
11
155
67
71
92
63
21
16
174
82
87
112
61
4
21
142
81
55
79
59
6
14
100
50
46
53
47
4
14
155
68
66
57
98
8
32
145
67
72
56
89
3
29
104
50
52
46
58
23
134
62
62
53
80
4
22
61
27
26
29
32
13
34
16
13
17
17
3
3
56
15
19
20
36
5
3
61
31
26
28
33
1
12
70
26
35
30
40
7
13
80
34
42
34
46
4
14
100
38
51
37
63
6
21
2176
983
995
1043
1119
90
332
Pteromys volans
Source/Owner: Ralf Wistbacka
Survey of nest boxes / Capture Recapture
Data contains notes of pellets, urinemarks, animals ears and weights.
Not all flying squirrels (FS) have eartagID recorded

7. Metapopulation Research Group
European Boreal Forest Biodiversity (EBFB)
Dataset: Flying Squirrel Capture Recapture – Ralf Wistbacka – Vaasa-Mustasaari / Finland
Year
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
Total
No# Box No# Box No#
No# FS
No#
No#
No#
visited
visits Visits+FS recorded Males Females Adults
39
115
26
49
19
26
26
65
204
37
71
27
37
42
70
207
46
75
37
33
46
68
200
37
78
38
39
44
70
214
12
19
9
9
13
70
204
20
41
18
23
24
70
311
52
104
38
59
57
68
265
38
61
30
30
40
113
293
49
101
49
51
44
170
406
63
147
61
80
73
192
444
79
176
85
81
71
210
459
81
166
78
80
87
234
561
66
116
58
53
57
228
433
88
173
72
96
79
238
465
105
241
105
126
92
229
408
63
132
60
71
59
244
459
97
236
100
110
95
239
445
86
176
78
90
74
261
476
72
151
71
70
63
260
460
67
152
69
76
59
275
451
71
160
69
84
49
4
4
3417
7484
1255
2625
1171
1324
1194
Species:
Method:
Add.info:
No#
No#
No#
Juveniles Deads Mothers
23
2
12
28
10
28
8
34
13
6
2
17
6
47
2
16
21
8
57
19
71
1
26
103
28
79
2
25
58
1
20
94
30
149
6
48
73
5
30
141
6
50
102
35
87
7
28
93
2
29
109
5
28
1420
39
Pteromys volans
Source/Owner: Ralf Wistbacka
Survey of nest boxes / Capture Recapture
Data contains notes of pellets, urinemarks, animals ears and weights.
Not all flying squirrels (FS) have eartagID recorded
471

8. Metapopulation Research Group
European Boreal Forest Biodiversity (EBFB)
Dataset: Flying Squirrel Capture Recapture – Ralf Wistbacka – Sundom / Finland
Year
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
Total
No# Box No# Box No#
No# FS
No#
No#
No#
No#
No#
No#
visited
visits Visits+FS recorded Males Females Adults Juveniles Deads Mothers
10
10
15
17
19
19
1
1
1
1
2
2
30
43
3
6
3
3
2
4
1
2
3
3
9
3
5
2
7
1
30
43
9
14
7
7
8
6
3
29
29
6
18
4
11
6
12
4
30
45
22
45
13
28
14
31
1
6
45
78
21
53
15
31
19
34
1
13
41
58
19
39
22
13
13
26
6
42
45
7
18
5
11
5
13
4
26
36
9
21
3
12
7
13
1
5
321
428
100
224
75
121
76
147
4
43
Species:
Method:
Add.info:
Pteromys volans
Source/Owner: Ralf Wistbacka
Survey of nest boxes / Capture Recapture
Data contains notes of pellets, urinemarks, animals ears and weights.
Not all flying squirrels (FS) have eartagID recorded