Birds tested in active and passive surveillance (A/P) with WNV- and USUV-positive specimens.

*Other bird species tested in passive surveillance (number of specimens): Apus apus (16), Larus michahellis (14), Athene noctua (6), Falco tinnunculus (5), Otus scops (5), Picus viridis (5), Hirundo rustica (4), Passer domesticus (4), Ardea cinerea (2), Buteo buteo (2), Carduelis carduelis (2), Ciconia ciconia (2), Larus ridibundus (2), Perdix perdix (2), Scolopax rusticola (2), Accipiter nisus (1), Anas platyrhynchos (1), Ardea purpurea (1), Ardea spp. (1), Asio spp. (1), Carduelis chloris (1), Carduelis spinus (1), Cuculus canorus (1), Dendrocopos spp. (1), Egretta garzetta (1), Erithacus rubecula (1), Falco subbuteo (1), Fringilla coelebs (1), Fulica atra (1), Merops apiaster (1), Passer montanus (1), Phasianus colchicus (1), Phoenicurus phoenicurus (1), Podiceps cristatus (1), Recurvirostra avosetta (1), Sterna hirundo (1), Strix aluco (1), Upupa epops (1).