Authorities in Western Australia and South Australia carry out urgent testing for H5N1 after two migratory seabirds found near Esperance are reported as infected. The development triggers expanded screening of 13 seabirds considered possibly infected. Testing is organised along a broad stretch of coastline, reported as running from Geraldton in Western Australia to South Australia’s southern coast. The birds are being assessed as part of efforts to confirm whether the virus has spread beyond the initially identified cases. Public health and animal health agencies use laboratory testing to determine H5N1 presence in the additional birds and to understand the extent of exposure tied to migratory routes. The reporting describes the response as an urgent measure following the confirmed detections in the Esperance area, with coordination across regions to ensure timely results. Both outlets frame the action as precautionary surveillance while results are pending, rather than confirmation for all birds included in the testing program.