Archive for October, 2010

Bat conservation project in the Aveyron valley, France

Tuesday, October 19th, 2010
Bechsteins bat caught in the Aveyron valley

Bechsteins bat caught in the Aveyron valley

During September Toby and Stewart along with 4 other members of the Cheshire bat group attended a course which is part of a European Bat Conservation project in the Aveyron valley, France.  Mainland Europe has over 50 native species of bats and a wide range of habitats, which provide a great opportunity to observe species which are rare in the UK.

The course was conducted by Marie Joe Savage who holds the relevant licences to trap bats and to oversee other people handling bats.

The Aveyron Region of France ha s a wide variety of landscape features such as caves wooded valleys, mature forests, rivers and heaths which provide high quality feeding, foraging and roosting opportunities for many species of bats.

Greater horseshoe bat caught in the Aveyron Valley

Greater horseshoe bat

Bat surveys were conducted in a different area every evening. A central point was selected around which large mist nets and harp traps were set up to catch and identify a sample of the local species. Transects were walked in areas around this central point to record the wider distribution pattern of species in the area.  Anabat bat detectors together with Pettersson D240x time expansion devices were used in order to record any calls at maximum quality.

The mist nets and harp traps had a lot of success and a good number of bats were captured. All were quickly removed from the traps in order to minimise any distress caused. The captured bats were then identified in hand before being weighed and measured and then set free.

Species caught in the traps were;-

  • Greater horseshoe bat – Rhinolophus ferrumequinum
  • Lesser horseshoe bat – Rhinolophus hipposideros
  • Greater mouse eared bat – Myotis myotis
  • Lesser mouse eared bat – Myotis blythii
  • Brown long eared bat – Plecotus auritus
  • Grey long eared bat – Plecotus austriacus
  • Alpine long eared bat – Plecotus macrobullaris
  • Common pipistrelle – Pipistrellus pipistrellus
  • Nathusius’ pipistrelle – Pipistrellus
  • Kuhl’s pipistrelle – Pipistrellus kuhlii
  • Natterer’s bat – Myotis nattereri
  • Bechstein’s bat – Myotis bechsteinii
  • Daubentons bat – Myotis daubentonii
  • Schreiber’s bat – Miniopterus schreibersii
  • Alcathoe’s bat – Myotis alcathoe
  • Whiskered bat – Myotis mystacinus

The trip proved to be a great experience and a real help to identifying bats in the hand, including the difference between grey long eared bats and brown long eared bats, and also the UK’s newest resident species the Alcathoes bat.