Most common and rarest Bat species in Somerset

We are very lucky in Somerset to have found 16 of the 17 breeding species of UK bats.  This is approx one third of all the UK Mammal species.

The BCT have produced an excellent leaflet on identifying bats in flight – What bat is that?


Common Bat Species in Somerset

Common Pipistrelle (Pipistrellus pipistrellus)

Common Pip

Pipistrelles are the commonest British bats, weighing around 5 grams (same as a 20p piece). A single pipistrelle can eat 3,000 tiny insects in just one night!  They have erratic flight with lots of twists and turns and downward swoops.
Common throughout Somerset, often roosting in modern houses.

Soprano Pipistrelle (Pipistrellus pygmaeus)

Soprano pipistrelle Bat

Similar to common pipistrelle but distinguished by its higher frequency echolocation call.
Not as frequent as Common Pips, but frequently found in damp Somerset woodland, or near water.  Good places to see them are the Westhay reserve and Chard Reservoir

Brown long-eared bat (Plecotus auritus)

Brown Long Eared Bat

This bat’s huge ears provide exceptionally sensitive hearing – it can even hear a ladybird walking on a leaf!  Brown long-eared bats usually fly close to trees. Their  flight is slow and hovering. Their long distinctive ears can sometimes be seen in flight.
Fairly common throughout Somerset, it roosts in open lofts in older buildings or barns.

Daubenton’s bat (Myotis daubentonii)

Daubentons Bat

Known as the ‘water bat’, Daubenton’s bats fly very low over water, skimming the surface to catch insects with their large feet or tail. If you look closely you can see their white bellies.
Common throughout Somerset in wet woodlands or near water. Good places to see them are the Bishops Palace moat in Wells, Chard Reservoir or on the River Tone in Taunton.

Noctule (Nyctalus noctula)

Noctule Bat

This bat has long narrow wings and flies in a straight line with steep dives, very high and fast above tree tops.   It’s our biggest bat, but it’s still smaller than the palm of your hand!
A woodland bat, often roosting in hollow trees or bat boxes.


Uncommon Bat Species in Somerset

Serotine (Eptesicus serotinus)

Serotine Bat

The Serotine has broad wings and a leisurely flapping flight.
Declining in Somerset, now less frequently seen.  Feeds over Cattle grazed pasture.  Likes to roost in Victorian houses with Clay tile roofs and deep barge boards.

Natterer’s bat (Myotis nattereri)

Natterers Bat

Its broad wings enable it to fly slowly and prey on a wide variety of insects, even snatching spiders from their webs!
A woodland bat, regularly seen in the Mendips. Roosts in bat boxes and some of our bat houses.

Lesser Horseshoe bat (Rhinolophus hipposideros)

Lesser Horseshoe Bat

Hangs upside down, able to wrap its wings completely around its body while at rest, differing from the greater horseshoe bat whose face can usually be seen. Adults are the size of a hanging plum.
A species locally common in the Mendips, uncommon elsewhere. Prefers to roost in older buildings and stone outbuildings.

Greater Horseshoe bat (Rhinolophus ferrumequinum)

Greater-Horseshoe Bat

Horseshoe bats possess a distinctive horseshoe-shaped noseleaf. Only found in the south west of England and south west Wales. Also hangs upside down, with wings wrapped round its body. The adults are the size of a hanging pear.
Nationally endangered, with only approx. 5-6000 individual.  Around 12% of the national breeding colony are roosting in the Mendips, and hibernating in local caves.

Whiskered bat (Myotis mystacinus)

Whiskered Bat

Slightly smaller than Brandt’s bat but sharing the same shaggy fur.
Small roosts in older cottages, we have little information on Somerset roosts


Rare Bat Species in Somerset

Brandt’s bat (Myotis brandtii)

Brandts Bat

Very similar to the whiskered bat, only being separated as distinct species in 1970. Has been recorded in Somerset, but limited knowledge of their breeding status so far.

Barbastelle (Barbastella barbastellus)

Barbastelle Bat

A rare and distinctive bat with a pug-like face and large, wide ears.
We have confirmed it as breeding in Somerset’s ancient woodland.

Grey long-eared bat (Plecotus austriacus)

Grey Long Eared Bat

This bat is generally a little larger than the brown long-eared bat and has a dark face. A back from the brink target species.
Somerset may be a hotspot for them, but we are still collecting information.

Leisler’s bat (Nyctalus leisleri)

Leislers Bat

Also known as the ‘hairy-armed bat’, it’s similar to the noctule but smaller with longer fur.
We have very little information, however recently discovered a roost in the center of Taunton.

Nathusius’ pipistrelle (Pipistrellus nathusii)

Nathusius Pipistrelle Bat

A previous migrant species, it has only been classed as a resident species since 1997. A few have been recorded in flight, but little information on breeding in Somerset.  Has been found breeding north of the Mendips

Bechstein’s bat (Myotis bechsteinii)

Bechsteins Bat

One of our rarest bats, found in parts of southern England and south east Wales.
We recorded these during the BCT Bechstein’s survey, with possible breeding colonies towards the Dorset border.


UK resident Species not found (yet) in Somerset

Alcathoe bat (Myotis alcathoe)

Alcathoe Bat

The latest addition to the UK bat family, only being confirmed as a resident species in 2010 due to its similarity to the whiskered and Brandt’s bat species.
The group did trapping surveys in the mid 2010’s looking for Alcathoe, but have not found any evidence in Somerset yet.  However they have been found recently just over the northern border into Wiltshire.


Vagrant species and occasional visitors

Greater mouse-eared bat (Myotis myotis)

Greater Mouse Eared Bat

This bat was officially declared extinct in 1990, but a solitary individual has been hibernating in southern England since 2002. Has never been seen in Somerset.