1. Wolfgang Nentwig, Institute of Ecology and Evolution, University of Bern, Baltzerstrasse 6, 3012 Bern, Switzerland; E-mail: wolfgang.nentwig@iee.unibe.ch
2. Theo Blick, Heidloh 8, 95503 Hummeltal, Germany; E-mail: info@theoblick.de
3. Daniel Gloor, Natural History Museum Bern, Bernastrasse 15, 3005 Bern, Switzerland; E-mail: gloord@bluewin.ch
4. Peter Jäger, Senckenberg Research Institute, Senckenberganlage 25, 60325 Frankfurt, Germany; E-Mail: peter.jaeger@senckenberg.de
5. Christian Kropf, Institute of Ecology and Evolution, University of Bern, Baltzerstrasse 6, Bern, Switzerland, and Natural History Museum Bern, Bernastrasse 15, 3005 Bern, Switzerland; E-mail: christian.kropf@nmbe.ch