Urban foxes no more cunning than rural ones, researchers find
www.theguardian.com
City dwellers just as likely to be too ‘shy or lazy’ to solve puzzle for food as their country cousins, study finds

Study here. Essentially, they put food behind some puzzles and figured out how many foxes approached the puzzle and how many solved it. More urban foxes approached the puzzle than wild ones, but they solved at about the same rate. (I will admit I skimmed the actual study, so correct me if I’m wrong!)

Nighttime footage of foxes trying to solve puzzles to get at food here.