Venomous redback spiders are on the march in Japan, where they are believed to have arrived years ago as stowaways on cargo ships, a wildlife expert has warned. The creepy-crawlies, named after their fiery markings, have infested the Osaka region and are drawing closer to the capital Tokyo, said Japan Wildlife Research Centre official Toshio Kishimoto. A dozen people have reportedly been bitten in Osaka prefecture alone, media reports say, including a six-year-old boy who was treated with antivenom in June, the first time the medication had been used in the country. "Their poison is strong and they are particularly...