Birds tested in active and passive surveillance (A/P) in 2011 with USUV-positive specimens.

Common Kestrel (Falco tinnunculus) 35, Little Owl (Athene noctua) 29, Common Pigeon (Columba livia domestica) 21, Black-headed Gull (Larus ridibundus) 15 (one specimen actively collected), Common Swift (Apus apus) 14, Long-eared Owl (Asio otus) 14, Common Buzzard (Buteo buteo) 10, Mallard (Anas platyrhynchos) 9, Common Pheasant (Phasianus colchicus) 8, Eurasian Sparrowhawk (Accipiter nisus) 6, Barn Swallow (Hirundo rustica) 6, Little Bittern (Ixobrychus minutus) 6, Eurasian Scops Owl (Otus scops) 6, Eurasian Nightjar (Caprimulgus europaeus) 5, Great Tit (Parus major) 4, Cattle Egret (Bubulcus ibis) 3, Eurasian Jackdaw (Corvus monedula) 3, Great Crested Grebe (Podiceps cristatus) 3, Northern House-Martin (Delichon urbica) 2, Great Spotted Woodpecker (Dendrocopos major) 2, Little Egret (Egretta garzetta) 2, European Robin (Erithacus rubecula) 2, Indian Peafowl (Pavo cristatus) 2, Great Cormorant (Phalacrocorax carbo) 2, Barn Owl (Tyto alba) 2, Northern Goshawk (Accipiter gentilis) 1, Eurasian Skylark (Alauda arvensis) 1, Common Teal (Anas crecca) 1, Goose (Anser anser) 1, Pallid Swift (Apus pallidus) 1, Squacco Heron (Ardeola ralloides) 1, Great Bittern (Botaurus stellaris) 1, European Goldfinch (Carduelis cardueli) 1, Black Tern (Chlidonias niger) 1, White Stork (Ciconia ciconia) 1, Eurasian Marsh-Harrier (Circus aeruginosus) 1, Common Wood-Pigeon (Columba palumbus) 1, Eurasian Cuckoo (Cuculus canorus) 1, Peregrine Falcon (Falco peregrinus) 1, Eurasian Coot (Fulica atra) 1, Common Moorhen (Gallinula chloropus) 1, Black-winged Stilt (Himantopus himantopus) 1, Black-crowned Night Heron (Nycticorax nycticorax) 1, Eurasian Golden Oriole (Oriolus oriolus) 1, Parus spp. 1, Greater Flamingo (Phoenicopterus ruber) 1, Eurasian Woodcock (Scolopax rusticola) 1, European Serin (Serinus serinus) 1, Tawny Owl (Strix aluco) 1, Blackcap (Sylvia atricapilla) 1, Eurasian Hoopoe (Upupa epops) 1, Northern Lapwing (Vanellus vanellus) 1.