1. Southern Swedish Forest Research Centre Faculty of Forest Sciences Swedish University of Agricultural Sciences P.O. Box 49 Alnarp SE‐230 53 Sweden
2. Division of Forestry and Forest Resources NIBIO P.O. Box 115 Ås NO‐1431 Norway
3. Department of Animal Ecology and Conservation Institute of Zoology University of Hamburg Hamburg 20146 Germany
4. Faculty of Applied Ecology and Agricultural Sciences Institute of Forestry and Wildlife Management ‐ Evenstad Inland Norway University of Applied Sciences P.O. Box 400 Elverum NO‐2418 Norway
5. Forestry Research Institute of Sweden Uppsala Science Park Uppsala SE‐751 83 Sweden
6. Department of Wildlife, Fish, and Environmental Studies Faculty of Forest Sciences Swedish University of Agricultural Sciences Umeå SE‐901 83 Sweden