A couple of days ago I found around a dozen of these flies in my garden. They are very distinctive with red eyes and a red crown between the eyes. Thanks to some help from various people on social media they were identified as Scathophaga suilla – a type of dung fly (particular thanks to Andrew Cunningham for the ID).
And herein lies the mystery – what dung are they using? There are no cows nearby and although there is a pony paddock adjacent to my garden the owners of the horses clear up their dung every day and bag it up for people’s allotments.
Cats are regularly seen in my garden as are badgers and foxes – a mystery that may never be solved! Any ideas?