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The American Pine Marten (Martes americana), also known as the American marten and sometimes referred to as simply pine marten, is a North American member of the family Mustelidae.

The American pine marten is broadly distributed in northern North America. From north to south its range extends from the northern limit of treeline in arctic Alaska and Canada south to New York. From east to west, its distribution extends from Newfoundland to western Alaska, and southwest to the Pacific coast of Canada. American marten activity patterns vary by region, though in general, activity is greater in summer than in winter. American marten may be active as much as 60% of the day in summer but as little as 16% of the day in winter. In north-central Ontario individuals were active about 10 to 16 hours a day in all seasons except late winter, when activity was reduced to about 5 hours a day. In south-central Alaska, American marten were more active in autumn (66% active) than in late winter and early spring (43% active).

American marten are opportunistic predators, influenced by local and seasonal abundance and availability of potential prey. They require about 80 cal/day while at rest, the equivalent of about 3 voles. Voles dominate diets throughout the American marten's geographic range, though larger prey—particularly snowshoe hares—may be important, particularly in winter. Red-backed voles are generally taken in proportion to their availability, while meadow voles are taken in excess of their availability in most areas. Deer mice and shrews are generally eaten less than expected, but may be important food items in areas lacking alternative prey species. Fish may be important in coastal areas.

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