Nipper flies......really, they are worse than mozzies or blackflies. They get me when I least expect it.
And it hurts!! Luckily they don't like wind so most of the time they don't bother us near the lake but when it's calm and hot they are ferocious. We must all pay some price for sharing the outdoors. At least the birds and fish must be happy when there are lots of nipper flies.