H5N1 Avian Flu Spreads Across Continents: Global Outbreak Tracker Reveals Persistent Threat to Poultry and Wildlife

This is “Avian Flu Watch: Global H5N1 Tracker.” Today we are taking a data-driven look at how highly pathogenic H5N1 is moving across continents, species, and borders. According to the UN Food and Agriculture Organization, since late September 2025 more than 950 H5 high-path avian influenza outbreaks have been officially reported in animals across 38 countries, with the heaviest concentration in Europe and the Americas. FAO notes that H5N1 remains the dominant subtype with zoonotic potential. Region by region, here is the current picture. In Europe, the UK government reports 64 confirmed H5N1 outbreaks in poultry in the 2025–26 season so far, including large commercial premises in Lincolnshire, Norfolk, and Devon. Protection zones of 3 kilometers and surveillance zones of 10 kilometers are repeatedly being imposed and lifted as new clusters are controlled. The European Centre for Disease Prevention and Control and WHO describe ongoing detections in wild birds along the North Sea and Atlantic coasts, with spillover into poultry in the UK, France, the Netherlands, and the Iberian Peninsula. Trend lines for Europe show a clear winter uptick, consistent with earlier years: cases bottom out in late summer, then rise sharply from October as migratory waterfowl arrive. In North America, the US Centers for Disease Control and USDA report that H5N1 remains widespread in wild birds and continues to cause outbreaks in poultry, with intermittent detections in dairy cattle and sporadic human infections. USDA’s wild bird dashboard shows new positives this autumn in Alaska and the Pacific Northwest, extending a multi-year epizootic first established in 2021. If you plotted these data, you would see a persistent plateau rather than a clean wave: the line never returns to zero. In South America, a 2025 phylogeographic study in the journal Viruses shows that clade 2.3.4.4b H5N1 has spread through at least 10 countries, affecting over 80 wild bird species and 11 wild mammal species. The analysis reconstructs two major routes into Uruguay: one via wild birds and poultry moving from Argentina, and another via marine mammals and seabirds moving from Chile. On a map, these routes trace a V-shaped pattern converging on the Atlantic coast. Cross-border transmission is being driven primarily by migratory flyways and shared coastal ecosystems. A geospatial modeling study published in 2024 highlights wintering wetlands and coastal stopover sites in Europe, West Africa, and the Americas as recurrent high-risk nodes. Visualize arcs along the East Atlantic, Mediterranean–Black Sea, and Americas flyways; outbreak dots cluster along those arcs, not political borders. There have been notable containment successes. The UK and several EU states have rapidly culled affected flocks, imposed movement controls, and in France, expanded vaccination of ducks. These measures shorten outbreak duration and flatten the peak of poultry cases on national dashboards. By contrast, delaye This content was created in partnership and with the help of Artificial Intelligence AI.