Kjell Danell1,
Roger Bergström2,
Margareta Stéen2,
Leif Mattsson3,
David4
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, Sweden
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, Uppsala, Sweden
- Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, Sweden
- Kent, Great Glen Wildlife, Sherren, Harray, Orkney, England