Heute wie vor hundert Jahren: Laufkäfer sind die Hauptbeute des Grossen Mausohrs (Myotis myotis) | Today and a hundred years ago: Carabid beetles are the main prey of the greater mouse-eared bat (Myotis myotis)
The faeces of an extinct colony of the greater mouse-eared bat,(Myotis myotis), were found in the church of Tegerfelden (NWSwitzerland)). The faeces could be dated to the end of the 19th century (around 1880). This find provided us with a unique opportunity to study the diet of the greater mouse-eared bat,and to compare the past and current diet of this species. Today,central European greater mouse-eared bats mainly hunt in forests, and carabid beetles (Carabidae) are their most important category of prey. In this study, we investigated whether this specialisation is caused by the changes to the landscape that took place during the second half of the 20th century, or if this bat species already exhibited a similar specialisation in the 19th century (loss of biodiversity, especially in open landscapes).