The following is a summary of what is known of the distribution of marten (Martes americana) and fisher (Martes pennanti) in North America. Since it is based on a survey of the available literature and an examination of a fairly large series of museum specimens, it deals with past as well as present ranges.
No takes yet. Share an insight, caveat, or question.
Edwin M. Hagmeier (1956) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context:
More from The Canadian Field-Naturalist