The physician discusses the most dangerous (other than humans) creatures:

http://www.omaha.com/article/20110506/LIVEWELL01/705079929/1161

It's the fearsome mosquito, killing over one million people a year by infecting them with malaria. Other insects snak up there as well, and he doesn't even discuss anaphylactic shock caused by bees, which dispatches about 50 folks a year in this country- far more than the count rung up by tiggers, bares, and lyons.

Looks like you need insect repellant carried in a handy holster....