Northern Prairie Wildlife Research Center
Table 4. Various indices of red fox densities in the reference area and estimated spring population of red fox families, 1963-73.
|Year||Township censusa||Strychnine-baited draw stationsc||Estimated spring populationd|
a Number of fox families in six townships
b Weighted average, of six strata encompassing the Prairie Pothole Region, of sightings of adult foxes seen per 1,609 km traveled during a 3-day period in April.
c Total foxes recovered at strychnine-baited stations reported by the U.S. Fish and Wildlife Service, Division of Wildlife Services, Bismarck.
d Number of fox families in our reference area.