Flies do not get a lot of love. Their culinary choices, from cow-pats to corpses, do not endear them to us. Add to that that the order Diptera also hosts mosquitoes, called our deadliest predator by some authors, and you can begin to see why. Entomologist Erica McAlister, the senior curator for Diptera at the Natural History Museum, London, is on a mission to change your mind. Chances are you never have been able to admire a fly close-up.