Figure 1

Map of northern Australia showing all sentinel herd and vector collection sites used during the evaluation period (2007–2012). Symbol shape represents the collections conducted at that site (circle – sentinel herd only, square – entomology only, triangle – both), colour represents the frequency of collections (red – regular (10-12/year), green – irregular (5-9/year), blue – rarely (4/year). Sites at which novel virus or exotic Culicoides have been collected, as listed in Table 1, are named and circled.