(A bog moth. By dreed41 via Flickr) Male moths fly miles to find love. They don’t know what the female sounds like, or even what she looks like. But when they smell her, boy, do they know it, and they use her seductive musk to track her down. The tracking isn’t easy: Even after getting a whiff of a virgin female, the male still has to figure out in what direction she lies. And he can’t lose heart when the wind blows the scent away abruptly, leaving him fluttering around aimlessly (video). Oh, and he has to beat out all the other males who are also racing to claim her. The female usually mates with the male that crosses the finish line first, after which she stops spraying the alluring perfume. No prize for second place. So to find the female, a male moth must first stumble upon her scent, and it's best if he has some type of strategy for doing so. How to go about it? Fly upwind? Downwind? Cut across the wind? Stay in one spot until the odor comes to him? The best way is to fly...