Masters, R. D. 1979. Daytime resting sites of two Adirondack pine martens. Journal of Mammalogy, 61(1):157.

Abstract: Daytime resting sites of two male pine martens (Martes americana) were located by radio telemetry on five occasions between 20 April and 3 May 1978, in the Adirondack Mountains near Newcomb, New York. The resting sites were found in mixed deciduous and coniferous forests, consisting primarily of the following species: sugar maple, Acer saccharum; beech, Fagusgrandifolia; yellow birch, Betula alleghanensis; hemlock, Tsuga canadensis; red spruce, Picearubens; and balsam fir, Abies balsamea. All sites were at least 1.7 m above ground and were in trees (Table 1). Four resting sites occurred in a logged forest interspersed with stands of mature and uncut trees.

Although this sample of den locations is too small to allow conclusions, the apparent preference of martens for tree resting sites appears to be unusual. Thirteen of 16 dens in Idaho were in logs and three were in stumps (Marshall, J. Forestry, 49:899-905, 1951). In Minnesota, 12 resting sites of two martens occurred in ground burrows, rock piles or rock crevices; only one was located in a tree (Mech and Rogers; U.S. Forest Service Research Paper NC-143:4-5, 1976). Availability of potential resting sites other than trees does not appear to be a limitation in the Adirondacks as such sites are relatively common. Perhaps the dampness from melting spring snows during late April made above ground sites more attractive.