Lloyd Spear wrote:

>Yes, that is exactly what is going on.  In fact, it is not at all uncommon.

Methinks perhaps a bit hasty? A visit in situ could alter an opinion and guess
made from afar. With recent research into the A.m. capensis problem, into
drifting, it has come to light that, in our bees' case, a lot more drifting
happens than was previously assumed.

Robber bees could have been trapped inside the hive when it was closed and
could have been *neutralised* as new occupants of the hive. Has dark coloured
emerging brood been observed? Or are only adult foragers black?

Robert Post