If you live in any northern boreal country in summer, you will know the dread & horror of the Vampire Fly aka The Deer/Moose/Elk/Horse/Caribou/Reindeer Fly.
It scissors open your flesh and creates an itchy massive inflamed red welt the size of a muffin top.
One got me in the neck: It looks like I’ve been hickeyed by a vacuum cleaner…