Myotis myotis

Copyright: ® Ján Svetlík

MissMhisi / CC BY-SA
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© Christoph Franz Robiller/Naturlichter.de
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© Ján Svetlík/http://www.dudok.sk

Sites with great info:

https://www.eurobats.org/about_eurobats/protected_bat_species/myotis_myotis

https://www.theguardian.com/news/2018/jun/12/the-last-bat-the-mystery-of-britains-most-solitary-animal

https://animaldiversity.org/accounts/Myotis_myotis/