H5N1 Detections in Australian Wild Birds Quadruple in 10 Days to 231

Confirmed H5N1 detections in Australian wild birds jumped from 52 on 1 August 2026 to 231 by 10 August, federal data show, spanning at least four states and reaching the Murray-Darling basin for the first time. The surge follows Australia's first confirmed H5 mass mortality in wildlife on 3 August. The containment window has effectively closed.