Department For Environment Food and Rural Affairs (DEFRA) officials move crates of ducks during a cull at a duck farm in Nafferton, northern England November 18, 2014. Bird flu was found on a duck farm in England on Monday days after it was discovered in Dutch chickens, forcing authorities to destroy poultry and restrict exports, although it was not a strain known to be deadly to humans. Health officials said the outbreak may have been brought to Europe by wild birds migrating from Asia where millions of South Korean farm birds have had to be destroyed. REUTERS/Darren Staples (BRITAIN - Tags: ANIMALS DISASTER ENVIRONMENT HEALTH TPX IMAGES OF THE DAY)