Bats in Hertfordshire & Middlesex

There are 18 species of bat in Britain, but only 10 are regularly found in Hertfordshire and Middlesex. Another two species (Whiskered and Brandt's) have been recorded, but very rarely. 

The Common and Soprano Pipistrelles are the most widespread.  They are the bats you may see flying around your garden shortly after sunset.  They are also amongst our smallest bats weighing less than a sheet of A4 paper and fitting comfortably into a matchbox.  Even the largest British bat, the Noctule, only weighs as much as two 50 pence coins.

More information on each species of British Bat can be found at the Bat Conservation Trust’s website: http://www.bats.org.uk/pages/uk_bat_species.html

Bats you can find in Hertfordshire & Middlesex are:

Common Pipistrelle - Widespread, occasionally common. One of the two species most likely to be encountered.

Soprano Pipistrelle - Widespread, occasionally common. One of the two species most likely to be encountered.

Nathusius' Pipistrelle - Widespread, but still considered scarce. Usually recorded  foraging over large water bodies. 

Brown Long-eared - Widespread, relatively frequent but not often encountered outside of roosts.

Brown long-eared bat

Daubenton's - Widespread, relatively frequent near still water.

Natterer's - Widespread, relatively scarce.

Whiskered and Brandt's - Very few records and so assumed to be rare.

Serotine - Widespread, but scarce.

Leisler's - Widespread, but scarce.

Noctule - Widespread, but relatively scarce.

Barbastelle - Limited to a few wooded river valleys, where rare.