Garth wrote:
 
>  would geuss is that if 15 000 colonies of feral bees
> are removed from a city like Mexico city (every year), then there
> must be at least 40 000 feral colonies that have not been removed.
 
Just FYI, Tucson, Arizona -( not so different from the Transvaal or other
areas ?), now has upwards of 6,000 swarms being removed by commercial
outfits yearly, and even now (Mid November), one removal expert told me
they are getting 60 calls per day. The migratory phase seems to kick in
about October, and is still little understood ( or investigated). Where
are the locust specialists when we really need them ?....
  - John Edwards, Tucson Bee Lab, Arizona