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The marten belongs to the weasel family (Mustelidae), which also includes animals such as ermines, mink, ferrets, and wolverines. Marten are found in Canada and in parts of the United States and in the Eastern Hemisphere from Europe to the Malay region.
Winter home ranges and habitat use by sympatric fishers (Martes pennanti) and American marten (Martes americana) in northern Wisconsin. M.S. Thesis, University of Wisconsin-Stevens Point, Stevens Point, WI. Wydeven, A.P., J.E. Wiedenhoeft, and J.E. Woodford. 2007. Status of the American marten in Wisconsin.2005) conducted a mark-recapture study in the Nicolet MPA that provided a population estimate of 71 +30 for the area sampled. That estimate was extrapolated to 221 + 61 for the Nicolet MPA and adjacent areas. This compares to the initial estimate of 100-150 martens for the Nicolet MPA by Kohn and Eckstein (1987).