H5 Bird Flu Detected on Sub-Antarctic Heard Island: An Update
The latest findings from preliminary tests reveal the presence of H5 avian influenza (H5 bird flu) in additional wildlife species on Australia's remote sub-Antarctic territory of Heard Island, following initial confirmation in southern elephant seals in November 2025. This development comes as no surprise, given the known spread of H5 bird flu through direct contact or shared environments.
Scientists from the Australian Antarctic Program have identified positive test results in samples collected from various species, including southern elephant seals, Antarctic fur seals, and gentoo penguins. These samples were gathered during the RSV Nuyina's second voyage to Heard Island, which concluded in Hobart on February 3rd.
To prevent any potential biosecurity risks, comprehensive measures were implemented for these samples and all returning travelers, cargo, equipment, and clothing. Despite the remote location of Heard Island, situated over 4000km southwest of Perth and 1700km north of Antarctica, these detections do not significantly elevate the risk to Australia, which has already been grappling with elevated H5 bird flu levels.
The Albanese Labor Government is investing over $100 million to bolster bird flu preparedness and enhance national response capabilities. This includes the distribution of rapid response equipment across all states and territories and efforts to build resilience in Australia's most vulnerable native species.
Minister for Agriculture, Fisheries, and Forestry, Julie Collins MP, emphasized the ongoing need for Australia to remain focused on outbreak preparedness, highlighting the shared responsibility of biosecurity among governments, industries, communities, and individuals. Murray Watt, Minister for the Environment and Water, underscored the dedication of Australian experts, including researchers in Antarctica, the Southern Ocean, and the sub-Antarctic, who work tirelessly in challenging conditions.
Dr. Beth Cookson, the Australian Chief Veterinary Officer, confirmed that preliminary laboratory results indicate the impact of H5 bird flu on species beyond southern elephant seals, with additional detections in the same species from the second voyage. Ground observations from the scientists on the RSV Nuyina revealed no signs of ongoing mass mortality events in the visited areas.
This update serves as a reminder of the ongoing vigilance required and the importance of coordinated biosecurity measures across various sectors. The Albanese Government's commitment to investing in preparedness and response capabilities demonstrates a proactive approach to managing the threat of H5 bird flu.
