Friends of ours long ago took their family camping. I don't know what conditions they camped out under but upon awaking the next morning they all found they had been bit by something. Since the bites were common to all of them they went to the ER. It was determined that they had been bit by bats during the night. Bats can bite w/o causing pain?
They all had to be given the very painful rabies shots which I hear is administered with long needles that reach the stomach.
We have purple martins. We have bats. We have municipalities fog with insecticides. We still have mosquitoes in abundance.
FYI: I always wondered why the mosquitoes seems to favor me over other people. When outside with groups of people no one would be bothered by the flying hypodermics except for me. The others often noticed it. I always brushed it off saying "they must like beer" even though I seldom down more than a couple of beers a month. I found out very recently that they favor type "B" blood which I have and most others don't have.