The data collected to date is under analysis and will be uploaded as it is available.

We have 12 of the 18 native bat species in Britain confirmed as being present in the Sid Valley:

Common Species

  • Common Pipistrelle Pipistrellus pipistrellus
  • Soprano pipistrelle Pipistrellus pygmaeus
  • Brown Long Eared Plecotus auritus

Rarer Species

  • Nathusius pipistrelle Pipistrellus nathusii
  • Serotine Eptesicus serotinus
  • Noctule Nyctalus noctula
  • Leislers Nyctalus leisleri
  • Daubenton’s Myotis daubentonii
  • Whiskered Myotis mystacinus

Rarest Species

  • Barbastelle Barbastella barbastellus
  • Greater Horseshoe Rhinolophus ferrumequinum
  • Lesser Horseshoe Rhinolophus hipposideros

Through catching bats we hope to identify other species we have present and hope to find the other two rarest species the grey long eared and Bechstein’s as it is known they are present in the surrounding area.

Along with the species identification we have also established:

  • 30 roosts have been identified – 21 roosts of more common species and 9 roosts of the rarer species
  • The soprano pipistrelle is the most common species
  • We have discovered 3 of the 5 rarest bats in Britain in the Sid Valley
  • The importance of the River Sid for foraging and commuting
  • Flyways of barbastelle, lesser horseshoe, greater horseshoe
  • Important foraging grounds supporting up to nine species
  • Brief visits from Nathusius, Leisler’s
  • Involvement from over 150 people

One Species in Depth


  • ID features
    • Ears that meet in the middle
    • Dark pelage with pale tips
    • Medium size
  • Population numbers are estimated as little as 5000 in the UK
  • Distribution limited to the southern counties
  • Very few maternity or hibernation roosts known
Barbastelle Distribution

Future Activities

Bat activity is greatly reduced over the winter period and we will be arranging a variety of group activities will be organised for the spring next year.

One activity we will be undertaking is endoscope surveys to look for bats within trees over the winter period so please get in touch if you are interested to help with this activity.