TABLE 1

Duck species and influenza infection summary

Duck speciesnInfluenza virus status
IAVIAV+
All ducks300123177
A. acuta (northern pintail)312011
A. americana (American wigeon)251015
A. carolinensis (green-winged teal)19109
A. clypeata (northern shoveler)572829
A. platyrhynchos (mallard)16855113