" The current global outbreak of HP IAV (H5Nx) has had an unprecedented impact on wild birds globally. In North America HP IAV H5N1 (HP H5N1) was first detected in late 2021 and rapidly spread through migratory flyways. It was first documented in Minnesota and the upper Midwest in late March 2022. In North American wild birds there have been large scale mortality events with more than 9,300 reported infections in over 190 species and sustained transmission continuing over multiple waterfowl migration seasons. Reported wild bird detections are likely a significant underestimate of the impact on wild bird populations, as not every individual in a mass die off is tested and reported, and not all wild birds that succumb to this virus are found or tested"
