I agree with Sperm Bank and Kaptin M.
The worst mothers of CB's I have struck anywhere in the world are in Oz.
Particularly avoid anything brewing around Casino, Armidale, Coffs Harbour, Gold Coast, Sunshine Coast or Brisbane !!!!
They can be ferocious (as the last few days have proven).
Best advice is give them a WIDE berth as has been stated.
Don't be tempted to fly over one too closely or between two closely spaced cells.
Treat them with the respect they deserve.
They can BREAK A/C !!!!
Love to watch them though (from a respectable distance of course).