>I'm supposed to live in a city - it's densely populated with terraced houses in streets and an animal has to cross roads to get to the park. A few years ago a fox (could be the same friendly-neighbourhood) in our street calmly stood and let me take close-up flash photos of it. Is it that these urban animals are evolving to be less scared of us predators?

Fangs bared! That's learning, not evolution. :)