The Hornet Robber Fly is one of the UK’s largest flies.it looks quite ferocious but is harmless to humans.
It is a predator of a lot of other insects including Wasps, Grasshoppers and Beetles etc.
There are a few sites in Cholsey for these flies but never guaranteed.
Photo taken today in the east of Cholsey (courtesy Alan Dawson)
Photo taken last year in the west of Cholsey