Habitats of the Otter (Lutra lutra L.) in some Regions of Southern Bulgaria

The aim of present study was to gather base information on the distribution and relative quantity of otters in some habitats and regions, and thus to assist future monitoring of the species in Bulgaria. The otter was searched for in 111 UTM-grid squares mainly in Southern Bulgaria. It was found in 88 and absent from 23 of them. Environment stratification and habitat classification for 5 mountains, 3 valleys and Black Sea Coastal region was made. Data on otter quantity in some rivers and reservoirs is also presented.