The result of this migration and expansion of human populations was a significant reduction in range for the megafauna.[12] Of the many Camelops specimens recovered in North America, mostly in the Wisconsin region, only a small number demonstrate modification through human actions.[13] Some specimens have been interpreted as having been killed by humans based on the presence of spirally fractured bone fragments. None of the reported Camelops sites has been associated with stone tools, however, which would be an indicator of possible human use.[13]