Just read this on my computer Home Page , This Black fly does not bite in the normal sense , its acts as a saw ,injects a Anaesthetic into you so you will probably not noticed it having a go at you , can cause serious health problem could end up in hospital , if you notice it having ago do not scratch it , this fly is in quite a few regions , Valencia , Murcia ,Andalusia etc. that's what I read don't know much more about it ,but, at top of artical it says it's from HullLive whatever that is