Nick Upton / Samantha Pickering stroking/with a Noctule bat (Nyctalus noctula) next to a Serotine bat (Eptosicus serotinus) on her chest at her rescue centre North Devon Bat Care, Devon, UK, October 2015. Model re...

Nick Upton / Samantha Pickering stroking/with a Noctule bat (Nyctalus noctula) next to a Serotine bat (Eptosicus serotinus) on her chest at her rescue centre, North Devon Bat Care, Devon, UK, October 2015. Model r...

MYN / Dirk Funhoff / Lesser Noctule (Nyctalus leisleri), Kaiserslautern, Rhineland-Palatinate, Germany, May. meetyourneighbours.net project

MYN / Dirk Funhoff / Lesser Noctule (Nyctalus leisleri), Kaiserslautern, Rhineland-Palatinate, Germany, May. meetyourneighbours.net project

MYN / Dirk Funhoff / Lesser Noctule (Nyctalus leisleri), Kaiserslautern, Rhineland-Palatinate, Germany, May. meetyourneighbours.net project

Eric Medard / Leisler's bat (Nyctalus leisleri) flying low over water, taken at night with infra-red remote camera trap, France, July.

Eric Medard / Leisler's Bat (Nyctalus leisleri) in flight above water, mouth open to emit echolocating calls. France, Europe, July.

Eric Medard / Leisler's Bat (Nyctalus leisleri) in flight low over water, mouth open to emit echolocating calls. France, Europe, July.

Eric Medard / Leisler's Bat (Nyctalus leisleri) in flight low over water, mouth open to emit echolocating calls. France, Europe, July.

Eric Medard / Western Barbastelle Bat (Barbastella barbastella) in flight low over water, mouth open to emit echolocating calls. France, Europe, July.

Eric Medard / Leisler's Bat (Nyctalus leisleri) in flight low over water, mouth open to emit echolocating calls. France, Europe, July.

Simon Colmer / Leisler's bat (Nyctalus leisleri) climbing along branch, Captive, UK