Hello,
I suppose this is a strech, but I was hoping to ID a particularly nasty fly that matures this time of year around nw NJ / Poconos. It is a fairly slow fly, meaning it cannot run rings around your hand as you try to swat it. However, when it lands on skin, the bite is especially vicious....it can even bleed. The only advantage is it takes a few seconds from landing to biting, so usually there's enough time to swat & kill it. It is slow enough that swatting usually gets it, otherwise they buzz around your head several times before attempting to land again.
These flies have been major pains for years now. The eyes are a orange-like color, and the size is the size of a normal house fly, about a quarter-inch. Dragonflies particularly relish them as food....I had one buzzing around my dog's head while we walked on the road....a dragonfly came and scooped it up, right out of the air.
Dan