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During the Blitz of 1940–1941, for example, as German bombs rained down on London, isolated populations of Culex mosquitoes were confined to the air-raid tunnel shelters of the Underground Tube along with the city’s resilient citizens. These trapped mosquitoes quickly adapted to feed on mice, rats, and humans instead of birds and are now a species of mosquito distinct from their aboveground parental counterparts.* What should have taken thousands of years of evolution was accomplished by these mining sapper mosquitoes in less than one hundred years. “In another 100 years time,” jokes Richard Jones, former president of the British Entomological and Natural History Society, “there may be separate Circle Line, Metropolitan Line and Jubilee Line mosquito species in the tunnels below London.
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Timothy C. Winegard (The Mosquito: A Human History of Our Deadliest Predator)