American martens can have low survival rates in fragmented forests. This photo snapped by a wildlife camera in the Upper Hoh in August 2016 is the only verifiable detection of a Pacific marten on the Olympic Peninsula since 1991. Female martens range from 18 to 22 inches in length and weigh 1.5 to 1.8 pounds. Martens are about the size of a gray squirrel, weighing 1–3 pounds, with rounded ears, slender bodies, and long, bushy tails. The fur on the throat of martens is a buff or orange color; legs and tails are typically darker than the rest of the body. Range and Habitat. The American marten is an opportunistic predator with a diverse diet that includes mammals, birds, carrion, eggs, insects, and vegetation (fruits, berries, nuts, fungi, lichens, etc.). Native to both the Olympic Peninsula and the Cascade Range, Pacific martens are members of the weasel family and related to fishers and wolverines. The Pacific marten (Martes caurina) is found only in the western US and the Pacific coastal islands of Vancouver, Queen Charlotte, Admiralty, and Kuiu. Voles, squirrels and chipmunks are important food items for martens across their range. Assess population densities, distribution, and habitat needs in different ecoregions. The Pacific marten (Martes caurina) is a mysterious little predator that lurks in remote slivers of dense forests in coastal Oregon and northern California.But researchers warn populations may vanish in the next couple decades without conservation measures. It is a member of the mustelid family (commonly referred to as the weasel family), and is in the monospecific genus Pekania.. The fisher in the Pacific states is a candidate for threatened or endangered status under the Endangered Species Act (ESA). The fisher (Pekania pennanti) is a small, carnivorous mammal native to North America, a forest-dwelling creature whose range covers much of the boreal forest in Canada to the northern United States. Martens may disperse 20 miles or more from their natal areas. One is found on Kuiu Island and the other on Admiralty Island. 2020, p. 11). Conduct additional surveys in the vicinity of recent marten detections. Within Alaska, there are two known island populations where the Pacific marten occurs. The fisher (Pekania pennanti) and Humboldt marten (Martes caurina humboldtensis) are two mid-sized carnivores (“mesocarnivores”) in the weasel family, Mustelidae. Data gaps. Denizens of the Deep: Fisher and Humboldt Marten. Monitor the existing population to determine regional trend(s) and cause(s) of the recent documented decline. They prefer well-established forests with a snowpack in winter. 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