In preparation for the capture-recapture study with Montenegrina species in the frame of the WTZ project on Montenegrina ecology, we tested our planned method beforehand on snails in Austria. To ensure the comparability of the tested site and species we choose the biggest clausiliid snail of Austria, Herilla bosniensis. This species was introduced to Austria a few decades ago and only lives in the Klausenschlucht in Mödling. It is very abundant there and can be found on bare limestone rocks, very similar to Montenegrina.
After we chose our locality, the viaduct wall, we located a big square of about three square meters size. Within this area we marked all individuals with numbers and noted their position on the wall. Two days later we returned to the site and checked which of the numbered snails still were within the area, marked new individuals in this area and noted again the position of all specimens.
This pilot study revealed already interesting data on the movement of the snails and most importantly improved our method for the big study in Montenegro.