Harmless serotine vs Northern bat
The northern bat is heavier: 10.7 g against 8.86 g for the harmless serotine, about 21% more.

Photo: Jacques Christophe Werner (1798-1856) · Public domain · Wikimedia Commons

Photo: Mnolf · CC BY-SA 3.0 · Wikimedia Commons
What is the difference between a harmless serotine and a northern bat?
Each point below is worked out from a pair of recorded values.
- The northern bat is heavier: 10.7 g against 8.86 g for the harmless serotine, about 21% more.
- Both belong to the genus Eptesicus, so they are close relatives.
- The harmless serotine is listed as Near Threatened on the IUCN Red List; the northern bat is Least Concern.
Side by side
| Harmless serotine | Northern bat | |
|---|---|---|
| Scientific name | Eptesicus innoxius | Eptesicus nilssonii |
| Family | Vespertilionidae | Vespertilionidae |
| Order | Chiroptera | Chiroptera |
| Weight | 7.49 g – 8.86 g | 8 g – 13 g |
| Length | Not recorded | Not recorded |
| Lifespan | Not recorded | 15.5 years |
| Main food | Not recorded | Not recorded |
| Habitat | Not recorded | forest |
| Conservation status | Near Threatened | Least Concern |
| Countries recorded | Not recorded | Not recorded |
A scale drawing needs a recorded length for both animals; only weights are on record for this pair.
Full record: Harmless serotineFull record: Northern batCompare other animals