Breeding colonies of Myotis myotis and Myotis blythi in Piedmont and Aosta Valley (NW Italy): characterization and conservation

The authors discuss the results of a survey on the occurrence of breeding colonies of Myotis myotis and Myotis blythi in Piedmont and Aosta Valley. Five breeding roosts were found, four of them inside historical buildings and one in a unused mine. Colony sizes varied from 50 to 1259 individuals (numbers estimated using photographs taken in June). Conservation problems are analysed.