Geoffroy’s bat

The summer quarters of the Geoffroy’s bats in the surroundings of the Natura2000-Area “Atterttal” are hitherto only partly known. This is indicated by fluctuating numbers of individuals in the known summer quarters. It is suspected, that the Geoffroy’s bats move between various sleeping locations from day to day.

In order to verify this theory, within the LIFE Grassland project, experts conduct telemetric studies on Geoffroy’s bats from known colonies. Those studies allow us to locate further quarters of the Geoffroy’s bats and thus to provide better protection for the heavily endangered bat species. During those studies, the bats are equipped with a harmless transmitter, which transfers the bat’s precise location employing radio waves over several days. Thus we can locate the sleeping place of the equipped bats and might be able to discover new hideouts. Overall, tree telemetry studies are planned in the “Attertal” area.

The Geoffroy’s bats hibernate partly in caves of the Minette. However these caves are disappearing due to decay or sealing by humans. To help the species, there is a need to discover yet unknown winter quarters and to protect these caves from sealing in the future. For this reason, a monitoring scheme for 5 promising caves is planned during the beginning of hibernation season. The monitoring will be realized with a specifically developed photo trap, installed at the entrance to the caves and whose pictures allow a distinct and non-invasive identification of the different bat species.

Furthermore, there are no known summer colonies in the Minette area. A unique telemetry study on Geoffroy’s bats flying out of their winter quarter is hoped to reveal yet unknown summer quarters.