Northern bat hibernating deep in a disused cobalt mine in Norway.

English: Northern Bat (Eptesicus nilssonii) winter hibernating in Modum, Norway
Norsk bokmål: Nordflaggermus (Eptesicus nilssonii) i vinterdvale i nedlagt koboltgruve i Modum, Norge
Date 24 January 2010
Author Magne Flåten https://commons.wikimedia.org/wiki/User:Magnefl
Source: https://commons.wikimedia.org/wiki/File:Eptesicus_nilssonii_hibernating.JPG

The northern bat (Eptesicus nilssonii) is the most abundant species of bat in northern Eurasia. It is found from England to Hokkaidō and down to northern India. It is closely related to Serotine bat (Eptesicus serotinus). It is found from northern Scandinavia (beyond the Arctic Circle) to northern Italy, and eastern England to northern Japan.
Order: Chiroptera
Family: Vespertilionidae
Genus: Eptesicus
Species: Eptesicus nilssonii (Keyserling et Blasius, 1839)