Every year for the 15 years I've lived here, I've listened to foxes calling each other on the path behind my house - adults calling for a mate, or cubs yipping for Mum, and have regularly seen them in the early evenings. Once, one fell asleep curled up on my drive. This year, I saw one fox only in my garden. In the late summer, I heard it calling and calling for at least half an hour - and for the first time ever, no answering call. It feels like the end of an era, incredibly sad.