Abstract
During the 6-year period of 1950–1955 the writers gathered a total of 66 sight records of the pine marten (Martes americana origenes Rhodes) in Colorado. These records were supplied by 33 observers whose reliability is unquestioned; other records were discarded because of incompleteness or other shortcomings. Observation of 17 of the 33 individuals extended over the entire 6-year period. The 66 records are from seven counties (Garfield, Grand, Jackson, Larimer, Pitkin, Rio Blanco, and Routt), the gross area extending about 130 miles east and west and 120 miles north and south. It is considered that these boundaries contain about two-fifths of the marten range in Colorado. It is emphasized that these data, based solely on chance observation, are not quantitative in nature; they are not suitable for other than very general interpretation. In several instances, however, the preponderance of records by cover types or at certain times of the...
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