The purpose of the project is to study the movement patterns of the European Free-tailed Bat (Tadarida teniotis), aim to characterize its seasonal movements within the area, which is mostly unknown. This species (family Molossidae) appears and disappears from roosting sites, in a seemingly randomly pattern. It is capable of flying long distances (estimated 100’s km per night), and therefore very hard to be tracked with ordinary tools. Former studies examined the absence and presence of it in a few roosting colonies, but last only 1-2 seasons and were limited to 1-3 sites. With public participation, and the aid of long term monitoring devices, a continuous (both in terms of time and open spaces) sampling will be achieved. The general public will take a significant part in data collection. Data related to the presence and absence of Tadaridas, from all around the area, will be recorded using a web application that has been developed for this propose. Remote sites will be monitored by passive recording devices. The bioacoustics data analysis will be done by professionals from Tel-Aviv University. It is the first project that following movement patterns of bat populations over long periods of time, with such a significant public involvement.