During the past summer (we're just about in winter now), I had a
dozen or so hives on a small dam wall near my home base. The hives
were just feet from the water and dragon flies were always visible. I
never saw one chasing a bee, let alone catch one. I found two death's
head moths in these hives - what a remarkable insect; big, and
capable of emitting a truly scary noise. There were also always more
than a few lesser honeyguides around, but they don't harm bees.
These birds watch to see if you're cleaning up any hives or supers in
your bee yard. I have seen these pretty, shy, unobtrusive creatures
eating foundation wax.

Barry in Kyalami, near Johannesburg