10th European Bat Detector Workshop

5 - 9 August 2017
Bidarrai, The Basque Country (France)

Group Picture - Objectives - The Pyrenees - Bat Fauna - Program - Proceedings

In connection to the European Bat Research Symposium every three years, it has since 1991 been a tradition to organize a bat detector workshop just before or after the conference. With this years conference in Donostia (the Basque country), the 26 year old tradition was almost forgotten. So it is the pleasure of Nordic Chiroptera Information Center (NIFF) and Bluebat to inviting you to the 10th European Bat Detector Workshop.

The event was organized in Bidarrai (the Basque country) just on the French side of the Spanish border, only 76 km from the conference in Donostia (San Sebastián).

The workshop started on the same evening as the conference ended, allowing people to travel directly from one event to the other.

The European Bat Detector Workshop has traditionally been organized in connection to the European Bat Research Symposium. However, from 2011 there has been no practice for the symposium organizers to also organize the workshop.

The aim of the workshop was to get field training in practical bat work. This included the use of various detectors, and capture techniques.

Responsible organizers were Leif Gjerde (NIFF) and Didier Mauuary (Bluebat). Local organizers were Juan Tomás Alcalde, Nicolas Bernos (CPIE, the Basque Country) and Nicolas Valet (Auddice).


  • Photo gallery is on the way

  • Any pictures you might have taken, and still not delivered, it would be nice to receive a copy

  • We have already received a lot of material from the participants. So every participant we think might have additional recordings, pictures, presentations or other information, will be contacted on an individual basis.


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The landscape. Photo: Leif Gjerde.

The Group Picture

To download full resolution version (2.7 MB), click the picture, right click the new images, and "save as".



In front (from left):
Stefan Litner, Jean-Françios Julien, Cecilia Wide, Sven Eisenbiegler, Juan Tomás Alcalde and Yoann Roulet.

Middle row (from left):
Zoey Mauuary, Chris Corben, Heikki Lehtonen, Arnold Andreasson, Knut Åge Storstad, Marie-Jo Dubourg-Savage, Koen Mandonx, Yves Bas and Leif Yngve Gjerde.

Behind (from left):
Yuhzen Pessey, Tehri Wermundsen, Sylvia Stephan, Hamdah Ismail, Johannes Regelink, David Savage, Alexandre Haquart, Didier Mauuary and Frank Dziock.

Yuval Cohen was not present when the picture was taken.


The objective of the workshop was to improve training and knowledge of the latest technology and experience on field identification of flying bats. The mixture of novice and well experienced bat workers (and everything between) enhances the learning process by self awareness and development.
      The target group is idealistic bat workers (enthusiasts/idealists, NGO's and scientists) who is or will work with bats in the future. Students and NGO's may apply for reduced fee. Commercial bat workers will be excepted if there is space.

  • Learn the basic theory of bat identification with the aid of ultrasound devices.
  • Field training in using active detectors, such as the Petersson (D240X, D980), the AnaBat Walkabout, the EchoMeter and misc. flat screen versions.
  • Learning how to operate the passive detectors produced by Pettersson (D500x), Titley (AnaBat Express and AnaBat Swift), Mini Batcorder (EcoObs) and Wildlife Acoustics (SongMeter 2, 3 and 4).
  • Analyzing bat calls by using software from Pettersson (BatSound), Titley (AnaLook), Biotope (SonoChiro 4) and Wildlife Acoustics (Kaleidoscope).

Equipment we had available for testing were:

Passive detectors

  • AnaBat Express (Titley Scientific)
  • AnaBat Swift (Titley Scientific)
  • D500x (Pettersson Elektronik)
  • SongMeter 2 (Wildlife Acoustics)
  • SongMeter 4 Full Spectrum (Wildlife Acoustics)

Active detectors

  • Pettersson (D100, D240x, D980, D1000x)
  • Titley Scientific (Walkabout)
  • Wildlife Acoustics (EchoMeter)


  • BatSound 4.2
  • AnaLook
  • SonoChiro 4
  • Kaleidoscope Viewer

Searching for bats at Felsőtárkány during the 7th EBDW.


Chris Corben demonstrationg a car mounted microphone in Lithuania during the 8th EBDW.


The Pyrenees and the Lower Navarre region

Lower Navarre is a collection of valleys in the foothills of the Pyrenees. Bidarrai (French: Bidarray) is a commune of the Pyrénées-Atlantiques department in southwestern France. It is a Basque province of Lower Navarre. It is surrounded by low hills. The river Nive runs through the village.

Some links:



The Pyrenees.

The Bat Fauna

The bat fauna of the Basque country will cradually be presented here. So watch out for updates. So far we have confirmed the Nyctalus lasiopterus and Pipistrellus pygmaeus, and some new species are added to the list. The list is on 28 species!

Vespertilio murinus
Closest record was made in the Western Pyrenees just ca. 120 km to the south-east of Bidarrai. One male was caught on 25 July 2009 in the mountain pass of Sahún.
Source: Alberdi, Antton; et al. 2012. First records of the parti-coloured bat Vespertilio murinus (Chiroptera: Vespertilionidae) in the Pyrenees. Mammalia 76: 109-111. ISSN 1864-1547.

Plecotus macrobullaris
Found above 1500 meters above sea level in the eastern most tip of the Basque Country in the Pyrenees, but is challenging to find.


Bat species found in the Basque country:
  1. Rhinolopus euryale
  2. Rhinolophus ferrumequinum
  3. Rhinolophus hipposideros
  4. Nyctalus noctula
  5. Nyctalus leislerii
  6. Nyctalus lasioperus
  7. Vespertilio murinus
  8. Eptesicus serotinus
  9. Myotis alcatoe
  10. Myotis bechsteinii
  11. Myotis emarginatus
  12. Myotis escalerae
  13. Myotis daubentonii
  14. Myotis macrobullaris
  15. Myotis myotis
  16. Myotis mystacinus
  17. Myotis nattereri
  18. Myotis oxygnathus (=blythii)
  19. Pipistrellus pipistrellus
  20. Pipistrellus kuhlii
  21. Pipistrellus pygmaeus
  22. Pipistrellus savii
  23. Pipistrellus nathusii
  24. Plecotus auritus
  25. Plecotus austriacus
  26. Barbastella barbastellus
  27. Miniopteris schreibersii
  28. Tadarida teniotis (common)


Start: The workshop building will be accessible from 1700 h on the 5th of August, and the program starts at 1800 h.

End: We workshop will end on the 9th of August at 1200 h.

We will have at our disposal active and passive ultrasound detectors from three different producers (Titley Scientific, Petterson Electronic and Wildlife Acoustics). This will give the participants possibility to get familiar with different type of work equipment and possibilities that they offer.
      During the day we will analyze the recordings from previous evenings and attendants will be invited to have 20 minute lectures.
      In the evening we will divide in groups of five people that will check different areas for bats. Each group will have at least one experienced bat worker, who will lead them and be responsible for the quality of the collected data.

Lectures and workshop topics

  1. How to walk with the walkabout. Getting the most out of active monitoring.  (temporary title) – by Chris Corben
  2. 30 years of crossing zeroes: Comparing ZC and Full-spectrum.  (temporary title) – by Chris Corben
  3. A historical review through 27 years of tradition with European bat detector workshops (temporary title) – by Leif Gjerde
  4. Is sampling data with bat detectors an effective method for monitoring bat populations? Twentyfive years of experiences from monitoring bats in Norway, Sweden and Denmark  (temporary title) – by Leif Gjerde
  5. Using ultrasound devices for 3D tradjectory to monitor bat flight and behaviour. (temporary title) – by Didier Mauuary
  6. Acoustic monitoring and online web services (data saving, semi-automatic id and report) on the basis of the monitoring scheme Vigie-Chiro. – by Yves Bas
  7. Identification issues concerning ultrasound calls to Miniopterus vs. Pipistrellus – by Yves Bas
  8. Challenges in identifying ultrasound calls of Tadarida teniotis and Nyctalus lasiopterus, including social calls of N. leisleri – by Alexandre Haquart
  9. CloudedBats.org - free software for open data – by Arnold Andreasson
  10. Stereo recording applications to determine flight height classes, direction of flight and road crossings – by Yves Bas & Jean-Francois Julien
  11. Reviewing models of passive and active detectors – Discussion on quality, functionality and reliability. – Round table discussion
  12. Microphone quality and sensitivity – Testing in the field followed by discussion, organized by Didier Mauuary

Chris Corben talking about zero-crossing and the AnaBat system.

Leif Gjerde deploying a AnaBat SD2 passive detector.


There will be a DVD publication after the workshop which include pictures, soundfiles, analysis and statistics.

In addition we hope to publishing the results of our bat detector workshop in a special issue of Gudnjoloddi (ISSN 0809-2362). It will be published by NIFF and Bluebat together. The title will be "Proceedings from the 10th European Bat Detector Workshop, held in Bidarrai (Basque country) during 5th to 9th of August 2017". Leif Gjerde and Didier Mauuary will be editors of the proceedings. It is expected that each lecture will be published as a separate article in the proceedings. If no manuscript is received, we will publish the abstract alone.
      There is no limitation for the length of the articles, but the contents should be relevant to the talk. The proceedings will be in English entirely. There will not be included abstracts in Euskara, French or Norwegian.

Deadline for sending abstracts was 1st of July.
Deadline for contributing article manuscript is 31 December 2017.

Structure of reference for the proeedings
Gjerde, Leif. 2018.
A historical review through 27 years of tradition with European bat detector workshops. Gudnjoloddi (Lillestrøm) 32?: ?-?. ISSN 0809-2362.
Gjerde, Leif. 2018.
A historical review through 27 years of tradition with European bat detector workshops. Pp. ?-?, in Proceedings from the 10th European Bat Detector Workshop, held in Bidarrai (Basque country) during 5th to 9th of August 2017 (Leif Gjerde & Didier Mauuary, eds.). Nordic Chiroptera Information Center & Bluebat, Lillestrøm/Grenoble 2018. ? pp. ISBN 978-82-7905-106-0.

Sponsors providing field equipment:




Page established 4 March 2017
Last updated 27 October 2017

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