Bitey bastards

It was already horsefly season here, but now the as yet unidentified, silent and stealthy little bitey bastard flies have started too.

I seem to be of the right blood type to be attractive to unidentified little bitey bastard flies. My skin reacts by starting to grow a volcano-shaped swelling at the point of puncture, which then continues to itch enough for me to consider amputating the affected limb.

These are currently the only two creatures in the entirety of creation that I will kill on sight.

Unfortunately, I mainly get to see them – and then try to kill them – when I notice one is settled and has just bitten me.