So after 2 yrs and about $25 worth of peanut butter ($3 jars), I have to conclude that the use of a jar of peanut butter screwed to a tree is a dismal failure as a deer attractant. I have 100's of photos of everything from turkeys, raccoons, porcuine and fishers climbing up and taking some, but only a handful of any pics of deer being attracted to it.
The most common critter..the Fisher....they seem to love it and within days of the jar being put out it's been licked clean by them..even when it's -20.
They are even fairly adept and unscrewing it and taking the jar away :)
I have one more jar to test...I'm going to wait till Dec when it's stays below freezing all day, and I'm going to cut out slates on the side of the jar and hang it from a tree. See if it will deter the small critters and see if the deer will come by and lick at it....let you know come Dec.
http://i125.photobucket.com/albums/p...6/PICT0073.jpg