Fig. 1

The Island of Mallorca with the location of the 70 sites (black dots) monitored for the presence of Ae. Albopictus. The circles indicate an area of diameter equal to the average nearest neighbor distance between the sites (3.6 Km). The grey triangle is the site of first observation in 2012. Note that the more eastern locations have been monitored in 2012 only when the species was first reported in Mallorca