Suspect african swarms have to be requeened quickly in order to prevent 
a potential stinging issue.  This is nothing new since experienced 
beekeepers requeen swarms right away anyway because the queens are old.

Regarding the reason not to save hot hives: Established african hives 
need to be split down into multiple nuc-sized hives in order to requeen 
them.  The queens run and hide so they are too hard to find and kill in 
a full sized hive.  Temperament of hot hives varies day-to-day, so 
sometimes they get riled up during the splitting/requeening process.  
Thus requeening african hives is not a problem in isolated rural areas, 
but at least in CA, most places that have african bee problems are the 
urban places.  And the beekeepers who acquire hot swarms are back-yard 
hobbiests (who don't have liability insurance).  Hence the advice of 
requeening swarms immediately or dry-icing hot hives.

I personally collect and use every swarm I can conveniently get.  But I 
am very careful.

--Jeremy Rose
San Luis Obispo, CA

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