On May 11 2016 in cooperation with NP Una in Bosnia and Herzegovina LIFE DINALP BEAR team from Croatia participated in collar and den site search of bear named Buk. After two years of successful GPS/GSM telemetry tracking of bear Buk, collar dropped-off on April 20, 2016. LIFE DINALP BEAR team used opportunity to retrieve the collar and to find the den site from winter 2015/2016. Location was about 15 km north-east form Bihać at the area called Mašinske doline and Dolovi. During his „telemetry“ life bear Buk has been using transboundary territory in both Bosnia and Herzegovina and Croatia.