Found in the house, one also seen outside. I'm not sure that i have the species correct.
No interactions present.
I think you are correct with this. The yellow hairs on the scutellum (that little triangle) are not as obvious as usual, but I think they are there.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
I was going to suggest S. caesareus, as I photographed asimilar beastie in the past, iwill now back check.
S. erythropterus, caesareus, and dimidiaticornis are very similar. On the W Isles I would be astonished if it were anything other than erythropterus. S. caesareus has yellow hairs on the temples, not evident here, so I would go with erythropterus with a partly worn (de-haired) scutellum.
The Platydracus beetles have the same pattern, but a different head-shape.
Thanks for the info.
Thank you very much for your input on this Syrphus!
Lat/Lng: 57.1874, -7.4001
OS grid ref: NF738236