No. of Samples Frequency (%) Female Male Unknown sex Pan Flavi WNV Source Aedes vexans 995 38.7 955 0 40 Negative Negative [21] Culex pipiens /torrentium 619 24.1 530 0 89 Negative Negative [5,21] Ochlerotatus /Aedes cantans 550 21.4 14 0 536 Negative Negative [22] Coquillettidia richardii 301 11.7 243 0 58 Negative Negative [23,24] Aedes albopictus 80 3.1 32 22 26 Negative Negative [21] Culiseta annulata 73 2.8 14 0 59 Negative Negative   Anopheles claviger/petragnani 23 0.9 23 0 0 Negative Negative   Aedes sp. 20 0.8 0 0 20 Negative Negative   Culex sp. 18 0.7 0 17 1 Negative Negative   Anopheles claviger 16 0.6 16 0 0 Negative Negative   Anopheles plumbeus 10 0.4 5 0 5 Negative Negative [25] Aedes cinereus /geminus 9 0.4 0 0 9 Negative Negative CDC 2005 Culex pipiens pipiens 3 0.1 3 0 0 Negative Negative [22]; CDC 2005 Coquillettidia sp. 2 0.1 2 0 0 Negative Negative   Ochlerotatus communis 2 0.1 2 0 0 Negative Negative   Total 2,571 100.0 1,839 39 693

Table 3: Summary of all trapped mosquitoes in the Tyrols in summer 2011. Species in bold are evidently competent vectors of West Nile virus, species underlined are evidently competent vectors for Usutu virus.