Now, how much alcohol does it take to get them schnockered? Scientists routinely puff ethanol vapors at insects and measure their sensitivity with devices called inebriometers. Bugs are no lightweights, often withstanding vapor concentrations of 60 percent alcohol, far more than what's in our blood after a couple beers. "Someone who's had 10 drinks might have a blood alcohol content of 0.2 percent," says entomologist Coby Schal of North Carolina State University. To a mosquito, a blood meal that contains 0.2 percent alcohol is like drinking a beer diluted 25-fold.