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Home range requirements for the Newfoundland Marten are extremely large due to the larger body size. Males hold larger home-ranges (29.54 km2) than females (15.19 km2) which are significantly larger than other species of martens across most of the geographic range. These larger home-ranges reflect the larger body sizes and the lower diversity and abundance of prey. Martens will also adjust their behavior and home-ranges to suit the habitat needs since the average home-range of the marten is typically larger than the average defoliate parch size and therefore will need to adjust for defoliation disturbance. Newfoundland martens are also intrasexually territorial and show home-range fidelity. Home-range size have variation between years for both sexes based on the changes in the food abundance as well as the individual's ability to obtain their prey. Within the year, martens may modify their movements during the winter because it is an additional energetic constraint that they have to respond to the harsher weather conditions and lower resource availability.