Guardian: Wildlife is disappearing at an unprecedented rate in the countryside but nature is compensating as more species colonise urban areas, the government’s ecological advisers say. In the 12 years to 2006, the overall population of urban birds increased by 14%. Pigeon numbers more than doubled, and there were big increases among green woodpeckers, goldfinches, robins and great tits. Natural England’s annual state of the natural environment report, published today, finds birds, bees …