Finally...some responses. I am talking about "monster" black bears that have learned that human presence is at the bait site at some time and "become" nocturnal. Of course, once they become nocturnal you are NOT going to get another chance. Has anyone else experienced this? i first heard of this behavior on an older bear hunting video called "Master of the black bears". Les Nelson...one of the best guides I have seen anywhere was the one that first mentioned this. After I heard this from him...i started wondering why i wasn't seeing "Large" black bears...it all made sense. Once a bait site has been established (5-10 yrs) there seems to be a pattern among the larger boars to stay clear of the site until after dark. Anyone esle know about this?