Love the way your photo in the message has split the text - I read droppings were "twice the size of a mouse"

- elephant poo perhaps!
Anyway, we get droppings like this on our garden path, when the blackbirds have been gorging on pyracantha berries, but these are mostly gone now. As it was on a post it would suggest obviously a bird of some kind. Are there any berried plants in the area?