I bet it's pesticides. Or the eventual break down of the family unit that was predicted in the late 70's...
I`ve head cell phone towers being blamed ,,gets them disoriented ,cant find the way home...
Those are two of the theories being investigated. So far, no theories have come to the forefront. As much as I dislike the CBS show 60 Minutes, I did watch the section they did about bees on Sunday. Watch it at: What's with the bees?