A map of the index and neighbouring farms. The index farm, with three distinct fragments is presented in solid black. All neighbouring land fragments are outlined, and neighbouring farms 1 to 4 are labelled. Alpaca grazed a field on neighbouring farm 1 (grey shading) during November 2003 to March 2004. The location of badger setts (open circle) and of an infected dead badger (in January, circle with dot) is shown.