I just finished requeening 52 hives today, and I noticed quite a few cases 
of two queens per hive, even though the average hive is just 4 frames of 
brood or so. I've seen it on occasion like many of the rest of you have, 
but not like this year. The first time was last Fall when a hive in some 
Raspberries I was pollinating savagely attacked me, stinging me through 
the suit and following my car to the gate which I estimate a quarter mile 
away. It reminded me of the worst of the feral, never medicated or 
domesticated Scuts I had in Africa. I took some in later to the ag 
commissioner, and they were confirmed AHB. I went back later and killed 
the queen and reduced the amount of brood. A week and a half later I went 
back to requeen it, but there was a big, mature queen there and the hive 
was full of eggs and larva.

This last operation where I requeened there were about ten percent double 
queens, but I saw no link to aggressive behavior. Just more that usual. I 
wonder if that particular characteristic isn't necessarily linked to 
aggression. 

-- Visit www.honeybeeworld.com/bee-l for rules, FAQ and  other info ---