In August 2008 I moved into my new home. It was a very hot day and I saw
something very similar to this.

http://prehistoricparkip.wikia.com/wiki/Giant_Dragonfly

It was about 10 inches long and was hovering.
It had a head something like the head of a horse, thus I always thought
incorrectly they were called Horse Flies.
I saw them many years ago in a swamp - England.

Any idea what these horrible things may have been? This is not a wind up.