Nick Upton / Noctule bat (Nyctalus noctula) shown to two children and their father by Samantha Pickering at a public outreach event, Boscastle, Cornwall, UK, October 2015. Model released.

Nick Upton / Noctule bat (Nyctalus noctula) being fed with a mealworm at a public outreach event by Samantha Pickering, Boscastle, Cornwall, UK, October. Model released.

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.

Simon Colmer / Noctule bat (Nyctalus noctula) Captive, UK

Simon Colmer / Noctule bat (Nyctalus noctula) Captive, UK

Simon Colmer / Noctule bat (Nyctalus noctula) Captive, UK

Simon Colmer / Noctule bat (Nyctalus noctula) Captive, UK

Florian Möllers / Bat expert Karsten Kallasch examining a Noctule bat (Nyctalus noctula) hibernating in a former DDR building in Berlin-Myggelheim, Berlin, Germany. February 2006