I agree, but most beekeepers will not notice the two queens as they will
think that are simply seeing the same queen twice (unless they are close
together, of course).  However, if the beekeeper regularly marks queens then
it is then easily spotted when an unmarked queen is seen as well as the
marked one.

Peter Edwards
[log in to unmask]

----- Original Message -----
From: "Dave Cushman" <[log in to unmask]>
.
>
> It is neither rare nor un-natural... In my part of the UK it happens to
many
> colonies without the beekeeper even being aware of it.