At this time of year I'm a magnet for Clegs: they track me down within seconds of the car door being opened. But other people are completely safe and don't even know that Clegs are around. Based on a few casual surveys, I have found that people like me with blood group O+ are targets, but people with A, B or AB, either + or - are safe to a greater or lesser degree.
This is a female of the Cleg Haematopota pluvialis, and I usually find them attached to my skin as they slice down to reach blood (you can just make out the slicing mouthparts between the front legs).

And here's a close-up of the wonderful eye:
So....just as a quick survey, if you know your blood group and are attacked or left alone by Clegs, leave a quick message in the comments area and let's see if the O+ trend continues.
Another new moth today: Grey Arches - Polia nebulosa - which feeds on many trees and shrubs: