By Andrew M. Ramey and Colleen M. Handel, U.S. Geological Survey Linked paper: Highly pathogenic avian influenza is an emerging disease threat to wild birds in North America by A. M. Ramey, N. J. Hill, T. J. DeLiberto, S. E. J. Gibbs, M. C. Hopkins, A. S. Lang, R. L. Poulson, D. J. Prosser, J. …