Viruses isolated from cloacal and/or feather samples collected from wild ducks (Western Siberia, August-September 2012).

VI, virus isolation.Juv, juvenile birds (hatching year age); Ad, adult birds (after hatching year age); U, undetermined.CS, cloacal swab; FS, feather swab.VI：病毒分离（virus isolation）。Juv：幼龄鸟类（juvenile birds，孵化当年龄）；Ad：成龄鸟类（adult birds，孵化次年及以上龄）；U：未确定（undetermined）。CS：泄殖腔拭子（cloacal swab）；FS：羽毛拭子（feather swab）。