[5] The Newfoundland pine marten is similar in appearance to its continental cousin, but is slightly larger, with dark brown fur with an orange/yellow patch on the throat.

[5] The Newfoundland marten range is now condensed into approximately 13,000 square kilometers in the western part of the island, with a large portion of key habitat in the Little Grand Lake area.

[10] A wide spectrum of habitat types are used throughout the geographic range, however, it has been found the Newfoundland marten has a strong association with old successional forest.

[9] Due to infrequent fires, the episodic defoliation by the spruce budworm and hemlock looper are the primary form of natural stand-replacing disturbance.

[6] Home range requirements for the Newfoundland marten are extremely large due to the larger body size.

[12] 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.

[10] 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.

[10] Newfoundland martens are forest-dependent species because they require overhead canopy for security and avoidance of predation, structurally complexity with abundant coarse woody debris and large diameter trees for winter resting sites, maternal dens, and access to small mammal prey in winter, as well as martens are more successful at catching prey in the older, structurally complex forest which is not necessarily where the prey are abundant.

[12] The older coniferous forest is not needed just for escape from predation, prey availability, and den sites but also for thermoregulation.

[9] Tree height is important to provide this thermally neutral area from resting sites as well as escape routes from predators.

[13] Canopy closer is a critical element of marten habitat, studies have shown that the presence of vertical stem structure and down woody debris is adequate to provide the security needed even if over head cover is absent; though marten still typically avoid the areas that are devoid of trees.

[9] Down logs and other woody debris are important to the marten habitat, not just for cover from predators, but also for access to prey and for suitable sites for resting and maternal dens.

[9] Due to the changes in the stand-level dynamics and landscape-level phenomena shows that serious management is necessary to get the forests of Newfoundland to be prime habitat.

[9] However, the conflict between the valuable economic resource of the timber and the preservation of the Newfoundland Marten will continue, suggesting that the system of permanent habitat reserves may not be a stable management strategy.

[10] Out of these 8 only three small mammal prey species are found within the marten's forested range, including: meadow voles (Microtus pennsylvanicus), masked shrew (Sorex cinereus), and snowshoe hares (Lepus americanus).

[10] The introduced snowshoe hare is a critical food source during winter, which is the energetically stressful period during the year.

[10] Southern red-backed voles (Clethrionomys gapperi) may have been deliberately introduced to increase the small mammal prey population available for the Newfoundland marten.

[4] The Newfoundland marten's population appears to be several small metapopulations that have limited interpopulation dispersal there is a large concern for the viability of the species.

[16] The recent population census in 2007 estimates that the individual numbers are between 286 and 556 adults that are spread across 5 subpopulations with mean densities ranging from 0.04 to 0.08 marten per km2.

[6] Clear-cut size is determined by the economic logistic constrains including road accessibility, topography and the areas of mature timber.

[16] Outside of the PMSA, population continued to decline leading the committee on the status of Endangered Wildlife in Canada (COSEWIC) to list in April 1986 the Newfoundland marten as threatened.

[6] A total of 29% of critical habitat is fully protected where all forestry harvesting, traps and snares are legally prohibited.