Originally Posted by poboy
Sometimes the whistles get their attention, but I don't know about deterance.



Unless the whistle spooks them I never could see how they help. Deer can hear, see and smell vehicles coming and they are surely smart enough to put the sound and sight of vehicles together. They watch cars and trucks go by all the time in daylight and dark, in fair and stormy weather from the time they are born.

Yet they seem to never associate moving vehicles with eminent danger and will sometimes walk or run right in front of them or into the side of them as if they were invisible or not even in the same time/space dimension.

If vehicles smelled like predators or were covered in wolf or mountain lion hair I wonder if that would make a difference to them.