Black flies...meh. They're a nuisance. For me, they usually just buzz about my head and only land occasionally. Tough killen 'em I will say. Unlike mosquitoes, which are easy quarry.
I got no beefs with how the wildlife got parceled out amongst the various regions of the US. I'd much rather contend with what we got than say the southern folks. They got chiggers down there. Chiggers are nasty mean. Chiggers do this to you:
And they got snakes, too. Real snakes, not our whimpey garter types.