Nick Upton / Laura Hammerton being shown how to identify a Daubenton's bat (Myotis daubentonii) by Dr. Danielle Linton using a key during an autumn swarming survey run by the Wiltshire Bat Group, Box mine, Wiltshi...

Nick Upton / Laura Hammerton using a spring balance to weigh a Daubenton's bat (Myotis daubentonii) during an autumn swarming survey run by Wiltshire Bat Group, Box Mine, Wiltshire, UK, September. Model released.

Nick Upton / Member of the Wiltshire Bat Group identifying Daubenton's bat (Myotis daubentonii) with illustrated key during an autumn swarming survey run by the Wiltshire Bat Group, Box mine, Wiltshire, UK, Septem...

Dietmar Nill / Daubenton's bat (Myotis daubentonii) catching prey from surface of pond and transferring to mouth, captive, Germany, April

Dietmar Nill / Daubentons bat (Myotis daubentonii) catching prey from surface of a pond, captive, Germany, April

Dietmar Nill / Daubentons bat (Myotis daubentonii) catching prey from surface of a pond, captive, Germany, June

Dietmar Nill / Daubentons bat (Myotis daubentonii) catching prey from surface of pond, captive, Germany, September

Dietmar Nill / Daubenton's bat (Myotis daubentonii) catching prey from pond surface, captive, Germany, September

Jussi Murtosaari / Daubenton's bat (Myotis daubentonii) flying over a small river, Muurame, Keski-Suomi, Lansi- ja Sisa-Suomi / Central and Western Finland, Finland. June

Jussi Murtosaari / Daubenton's bat (Myotis daubentonii) flying over a small river, Muurame, Keski-Suomi, Lansi- ja Sisa-Suomi / Central and Western Finland, Finland. June

Jussi Murtosaari / Daubenton's bat (Myotis daubentonii) flying over small river, Muurame, Keski-Suomi, Lansi- ja Sisa-Suomi / Central and Western Finland, Finland. June

Jussi Murtosaari / Daubenton's bat (Myotis daubentonii) two in flight over a small river, Muurame, Keski-Suomi, Lansi- ja Sisa-Suomi / Central and Western Finland, Finland. June