Although the composition of diets of pine marten (Martes americana) is well studied (see Zielinski et al., 1983) direct observations of marten predatory behavior are rare. During a 15-month investigation of marten ecology at Sagehen Creek, California (Spencer et al., 1983; Zielinski et al., 1983), we sometimes observed marten in acts of predation. Observations involved five marked marten and one ...

Escalating harvest of remnant old-growth forests in the Pacific Northwest has precipitated concern for marten (Martes amaericana) as an old-growth dependent species (Meslow et al. 1981). Although recent studies have increased our understanding of marten habitat requirements (Koehler adn Hornocker 1977, Soutiere 1979, Steventon and Major 1982), little in-depth research has been done in the Pacific states. Also, the influences ...

Pine martens (Martes americana) consume a variety of food types annually but seasonal foraging is restricted to a subset of available prey. Winter foods include chickarees (Tamiasciurus douglasii), voles (Microtus spp.), snowshoe hares (Lepus americanus), and flying squirrels (Glaucomys sabrinus), whereas ground-dwelling sciurids (Spermophilus spp. and Eu- tamias spp.) comprise the bulk of the diet during the remainder of the ...