Eric Medard / Natterer's Bat (Myotis nattereri) flying low over water to drink, with long-exposure star-trails. France, Europe, July.

Kim Taylor / Natterer's bat (Myotis nattereri) about to drink from the surface of a lily pond, Surrey, UK

Terry Whittaker / 2020VISION / Natterer's bat (Myotis nattereri) held in the hand of a researcher, Kent, UK, September 2010

Eric Medard / Natterer's Bat (Myotis nattereri) in flight, leaving cave roost to forage at night. France, Europe, August.

Eric Medard / Natterer's Bat (Myotis nattereri) in flight over water with mouth open to emit echolocating calls. France, Europe, July.

Eric Medard / Natterer's Bat (Myotis nattereri) in flight above water, with splash from where it has drunk from surface. France, Europe, July.

Eric Medard / Grey Long Eared Bat (Plecotus austriacus) leaving nesting hole in tree. France, Europe, September.

Eric Medard / Natterer's Bat (Myotis nattereri) flying low over water, mouth open to emit echolocating calls. France, Europe, July.

Eric Medard / Nattererer's Bat (Myotis nattereri) in flight low over water. France, Europe, July.

Eric Medard / Natterer's Bat (Myotis nattereri) in flight over water, with splash from drinking from surface. France, Europe, May.

Eric Medard / Natterer's Bats (Myotis nattereri) leaving cave roost to forage at night. France, Europe, October.

Eric Medard / Natterer's Bats (Myotis nattereri) leaving cave roost to forage at night. France, Europe, October.