Should we wipe mosquitoes off the face of the Earth?

Even before the Zika virus, mosquitoes were the deadliest creatures on the planet. But gene modification means these blood suckers' days might be numbered. Is it dangerous to talk about 'editing nature', or should we consider eradicating them for good?

When an Aedes aegypti mosquito bites you, she - because only the females, which need blood as nutrients for their offspring, bite - will probe your skin with her proboscis as many as 20 times. Two pairs of sharp cutting edges, the fascicle, break the skin and then search for a blood vessel, withdrawing and re-entering until a suitable target is found. When the blood starts to flow, a salivary tube delivers a protein that stops it clotting. The mosquito holds still and then begins to suck; in 90 seconds' time, she feels full, and stops. And then, if you are in parts of South and Central America and bang out of luck, you will have Zika.

It's a horrible idea, and one that will draw shudders from anyone who has ever been bitten by a mosquito - which is to say, just about everyone. In the entire animal kingdom, the mosquito occupies a special place as receptacle for our hatred and disgust. Even the great and generous EO Wilson, author of the touchstone argument for preserving biodiversity, The Creation: An Appeal to Save Life on Earth, makes an exception for anopheles gambiae, which spreads malaria in Africa. "Keep their DNA for future research," he writes, "and let them go."