Tesserae and Rabbits find lost Roman Villas
I recently visited the restored Roman Villa at Chedsworth, England in the Cotswold hills. They had some very beautiful mosaics in the restored bath houses and dining rooms, dating back from between the 2nd and 4th centuries AD.
I was told that burrowing rabbits and other animals are often responsible, for bringing loose tesserae blocks to the surface, which result in long burried villas and other buildings being discovered. Chedworth villa, itself, was discovered by two men who were trying to retrieve a ferret, while rabbit hunting.
Here is a link that might be useful: Roman Mosaics