Seasonal dynamics of influenza A viruses (IAVs) are driven by host density and population immunity. Through an analysis of subtypic data for IAVs isolated from Blue-winged Teal (Anas discors), we present evidence for seasonal patterns in the relative abundance of viral subtypes in spring and summer/autumn.
Keywords: Anas discors; Neotropics; North America; avian influenza; blue-winged teal; influenza A; seasonal; subtype.