I found this on my head the second time today, last time i thought it was a spider (with doubts)
So i tried to look for it for like 1-2 hours before i got it finally
But they did not look like the first image because they can shed their wings when finding a suitible host and their wing shed form does get less acssociated with its name.
Its at least harmless because it does not really carry illnesses but it can leave an itchy head for weeks :/
Better than ill at least
Edit: you may confuse the deer flies im thinking of with the deer flies (yes, thats some nice naming there) You probably mean those: https://en.wikipedia.org/wiki/Deer_fly There also seems te be deer ticks which can also be dangerous and adds to the naming confusion https://en.wikipedia.org/wiki/Ixodes_scapularis
Meant harmless to human because they do not really carry disease.
I dealt with two and learned mostly about the scarce ressources on web so i dont really have actual experience
You obviously have not dealt with them before. They are the devil incarnate. Fast, sleek, robust. They go for places that are hard to reach, they go for the eye. They make the deer fly look like a very mild annoyance. When you think you killed them, they go full Lazarus. They are stealthy.
0/10 very bad experience, will not recommend.
i assume i got lucky but at least i know that they are only dead when (probably my) blood is spilled. i will never risk pests getting out alive after my experience with head lice
Edit: also i think i got very lucky so im biased and still dont want more exporiences with them