We seem to have Starlings. Or maybe rats. Over the last year or so we've been hearing odd noises in the loft but had little in the way of visual evidence of wildlife. I did spot a bird between the felt and tiles a few months ago, but not in the loft itself. However, during the really cold weather we've had recently the noise has been much, much worse, though it has eased now that it's warmer. I finally got round to having a poke around today. There are lots of little black droppings scattered, mostly towards one end of the loft, and a couple of likely 'tunnels' in the insulation towards the eaves. There was also a section (about 18" square between joists) where the insulation had been /completely/ shredded and removed and piled against the end wall of the loft. Most fascinating were a line of three 'igloos' between two joists where the insulation had been humped up, each igloo having a single entrance hole. No obvious feathers, though. I suspect starlings, however, the droppings are dark and I thought that birds 'urinate' white droppings. The house is about 25 years old and detached, but possibly other mammals could get up there via ivy on the front of the house. Anyone know what the culprit is likely to be?