SUMMARY (1) Migratory moose (Alces alces (L.)) studied in a population in central Sweden in 1980-86 were philopatric to their winter home-ranges during years and in areas of varying population density, snow conditions and forest browse damage. (2) Distances separating consecutive winter home ranges of moose (x = 3-1 km) did not vary with population density, sex or age but did differ in three subareas that differed in population density, snow depth and forest damage. (3) Winter home-range size was affected by long durations of snow > 70 cm deep but not by snow depths of 25 or 40 cm. Winter-range size (x = 11 5 km2, S.D. 139) did not difer in the three subareas, at different population densities, for different durations of time moose remained on the winter range, for bulls vs. cows or for moose of different ages. (4) Problems of moose management, such as browsing damage in pine plantations, cannot be approached by expecting moose to disperse from high-density wintering areas to low-density areas. In years with long durations of snow > 70 cm deep, browsing damage can be expected to be more intense and localized because of reduced home-range sizes.