1 Grimsö Wildlife Research Station, Department of Ecology, Swedish University of Agricultural Sciences, 73091, Riddarhyttan, Sweden. camilla.wikenros@slu.se.
2 Grimsö Wildlife Research Station, Department of Ecology, Swedish University of Agricultural Sciences, 73091, Riddarhyttan, Sweden.
3 Faculty of Applied Ecology, Agricultural Sciences and Biotechnology, Campus Evenstad, Inland Norway University of Applied Sciences, 2480, Koppang, Norway.