We found this very peculiar bug one evening inside our holiday house in central Portugal about a month ago. It was quite small, around 2cms long, and slow moving. The children were a bit freaked by it! I captured it in a jar and released it outside. It looks as though it has either a natural 'mud camoflague' skin or has acquired a coating of mud, though this seems unlikely as there was a heatwave at the time and not a drop of mud anywhere. Does anyone know what it is, please?