>
> >Might I have just lost the queen in the  previous 24 to 72 hours?


Definitely a possibility--were you in that hive during that time?  Sounds
most likely.

On rare occasions, I find colonies that run on the combs--I requeen.

If your honey flow just shut off, bees will sometimes roar more in response
to smoke.

Or, could the queen have mated with an Africanized drone, and hit a pocket
of hot semen in the last weeks?

-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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