Most years the field fares come through in a flock, eat all the berries, then leave. This year during the bad weather a few hung around under the bird feeders. Now they've all gone except one and it's behaving like a blackbird, chasing everything else off the food. It will wear itself out. I've got food in 3 places and its constantly going from one to the other. I haven't seen it eat anything yet.
I've never seen this behaviour before, is it normal?