Size and other features of British Bats (all measurements in millimetres)
|
Species
|
Forearm Length
|
Skull (condylobasal length)
|
Upper Tooth Count
|
Upper Tooth Row (c-m³)
|
Lower Tooth Count
|
Lower Tooth Row (c-m³)
|
Notes
|
|
Mouse-eared
|
57 - 68
|
22.0 - 23.4
|
2.1.3.3
|
9.6 10.4
|
3.1.3.3
|
10.4 11.2
|
Size
|
|
Greater Horseshoe
|
52 - 59
|
20.4 22.0
|
1.1.2.3
|
8.2 8.8
|
2.1.3.3
|
8.8 9.2
|
Nose leaf; size
|
|
Serotine
|
48 - 55
|
19.0 22.0
|
2.1.1.3
|
7.4 8.2
|
3.1.2.3
|
8.2 9.0
|
Dark brown; tragus
|
|
Noctule
|
47 - 55
|
17.6 19.0
|
2.1.2.3
|
7.0 8.2
|
3.1.2.3
|
7.2 9.8
|
Golden colour; tragus
|
|
Parti-coloured
|
40 - 49
|
14.2 15.5
|
2.1.1.3
|
5.2
|
3.1.2.3
|
5.4 5.8
|
Rare vagrant
|
|
Leislers
|
39 - 47
|
15.0 16.0
|
2.1.2.3
|
5.8 - 6.0
|
3.1.2.3
|
6.0 6.2
|
Dark brown; tragus
|
|
Bechsteins
|
38 - 45
|
16.0 17.0
|
2.1.3.3
|
6.2 7.3
|
3.1.3.3
|
7.2 7.6
|
Rare; ear length
|
|
Grey Long-eared
|
38 - 43
|
15.8 17.0
|
2.1.2.3
|
5.9 6.1
|
3.1.3.3
|
est. 6.3 6.9
|
Southern; ear length
|
|
Brown Long-eared
|
34 - 42
|
13.0 16.0
|
2.1.2.3
|
4.8 5.6
|
3.1.3.3
|
5.2 6.4
|
Widespread; ear length
|
|
Barbastelle
|
36 - 43
|
12.9 13.8
|
2.1.2.3
|
4.4 - - 4.9
|
3.1.2.3
|
5.0 5.2
|
Sooty black; ears
|
|
Natterers
|
36 - 43
|
14.0 15.0
|
2.1.3.3
|
5.6 6.4
|
3.1.3.3
|
6.2 6.6
|
Tail fringe
|
|
Lesser Horseshoe
|
36 - 40
|
13.8 15.2
|
1.1.2.3
|
5.2 5.6
|
2.1.3.3
|
5.2 5.8
|
Nose leaf; size
|
|
Daubentons
|
33 - 40
|
13.0 14.0
|
2.1.3.3
|
4.6 5.6
|
3.1.3.3
|
5.4 5.8
|
Large feet
|
|
Brandts
|
31 - 38
|
13.0 14.5
|
2.1.3.3
|
5.0 5.9
|
3.1.3.3
|
est. 5.7 6.3
|
Club-shaped penis
|
|
Whiskered
|
30 - 37
|
12.4 13.4
|
2.1.3.3
|
4.5 5.3
|
3.1.3.3
|
5.2 5.6
|
Pointed tragus
|
|
Nathusius Pip.
|
32 - 36
|
12.4 13.4
|
2.1.2.3
|
4.4 5.0
|
3.1.2.3
|
4.6 5.0
|
Rare vagrant
|
|
Pipistrelle
|
28 - 35
|
11.0 12.0
|
2.1.2.3
|
4.0 - 4.2
|
3.1.2.3
|
4.2 4.8
|
Blunt tragus; post calcarial lobe
|
