We identified clade 2.3.4.4 highly pathogenic avian influenza A(H5N6) viruses from whooper swans (Cygnus cygnus) found dead in Mongolia. The identification of these infections in wild birds in this area is of concern because of the potential for virus dissemination during fall migration.
Keywords: H5N6; Mongolia; highly pathogenic avian influenza; influenza; respiratory infections; viruses; wild whooper swans; zoonoses.