Michael Ackland wrote:
I think it is more likely to be Anthomyia quinquemaculata Macq, which is a southern European species. It seems to be large for pluvialis. But it is impossible to identify these Anthomyia species without a lateral view of the male 5th sternite, which is distinctive for most species. Therefore you will have to catch one and mount it if you wish to make a positive identification. They are too difficult generally to recognise from a photo, especially a photo of a living fly taken from above