Maybe they are tired of this crazy planet and are going to the 5th dimentsion?
They might be, becoming part of a new system of living and a new evolved species of bees. The bees are destined to live in harmony with earth and man in the new 5th density world. The disappearance of bees from the 3rd dimension will ensure the bees survival into 5th density.
The mass farming of bees is no longer in line with earths energies and this system shall therefor breakdown, transmute, and rebuild itself in line with the new energies as every structure and system is currently doing!
The mystery of the disappearing bees
http://www.youtube.com/watch?v=KrVEHriYNr4