In a recent summary of the natural history of this species in South
Dakota, Henderson _et al._ (1969) listed seven localities in Harding
County (all in prairie dog "towns") at which ferrets had been sighted or
trapped as follows (dates in parentheses): near Ladner (March, 1963); 17
mi. N Camp Crook (about 1956 or 1957); T. 20 N, R. 3 E (1964); T. 20 N,
R. 4 E (winter, 1964); T. 19 N, R. 1 E (late November, 1966); T. 17 N,
R. 8 E (summer, 1965); T. 15 N, R. 1 E (winter, 1963). These authors
also reported a specimen in the U.S. National Museum (no. 243990) that
was taken at Govert on November 1, 1923. Additionally, Wesley Broer,
then the local game warden, reported to one of our parties that a ferret
was seen on February 27, 1963, at a place 7 mi. N and 16 mi. W Buffalo.
Visher (1914) made no mention of this species in his report of the
natural history of Harding County.
~Mustela vison letifera~ Hollister, 1913