Man, this information was figured out more than 25 years ago. So it's breaking news now, is it? That's why bug zappers come with a little packet that you stick underneath that gives off CO2 and hormone odors - to draw in mosquitoes!! Well, I guess the new crop of recent young graduates who are now scientists & researchers have to do something to justify their salaries and the space they occupy in these citadels of "higher learning".