Agriculture Minister Julie Collins said the H5N1 bird-flu strain was detected in a greater crested tern found in Robe, South Australia [1].
This discovery marks the first confirmed case of the virus in an Australian native seabird. It indicates that the virus has transitioned from migratory birds to domestic species, increasing the risk of wider spread within local wildlife populations [2, 4].
The infected bird was located on South Australia’s Limestone Coast [3]. Testing performed by a CSIRO laboratory confirmed the presence of the H5 strain [1]. Following this initial discovery, additional confirmed cases emerged, including two more in South Australia and one in Western Australia [5].
Reports on the total scale of the outbreak vary. One source said the total number of confirmed cases in native seabirds has reached five [6]. Another report said the total number of detections in Australia has risen to 12 [5].
The spread of the virus to native animals represents a significant shift in the regional health landscape. Previously, detections were limited to migratory birds that traveled from other regions. The presence of the virus in a resident species like the greater crested tern suggests the pathogen is now circulating within the local ecosystem [2, 4].
Authorities continue to monitor coastal areas for additional casualties. The detection in both South Australia and Western Australia suggests the virus is present across multiple states, posing a potential threat to diverse avian habitats [3, 5].
“The virus spread from migratory birds to a native species.”
The transition of H5N1 from migratory visitors to native Australian wildlife suggests the virus is establishing a foothold in the local environment. This increases the likelihood of endemic transmission, which could lead to higher mortality rates among native bird populations and potentially jump to other mammalian species if the virus continues to mutate.
