Well, the trouble with flies and birds is that they fly too fast to be photographed.
And one of the rules I had set myself was that I could only record species that I could provide photographic evidence of. So I have various pictures of a black dot in a blue sky (at least it was blue, not grey!).
Here we have, what I believe was a house martin. There were both swifts and house martins in the sky – the swifts screaming up and down the valley in Red Arrow-like formation and the house martins flitting here and there. I am starting a Tally page with a separate list of species that I have seen but not evidenced, so I will put the swifts there for the time being.
Also on that list will be midges, a dragonfly, butterflies, and other unidentified flies. There is a particular blue butterfly that only Mr C has seen because by the time I have grabbed my camera, it has long gone. This has happened several times.
The house martins nested on our house the summer we moved here. It was exciting. In the last few years, I think they have nested on houses uphill from ours and then they fly down between the houses to the valley.