Australia and New Zealand launch large-scale vaccination efforts as H5N1 threatens vulnerable wildlife

In response to the spread of H5N1 avian influenza, Australia and New Zealand are implementing unprecedented vaccination programmes to protect their most endangered species, including a major effort to vaccinate thousands of little penguins on Phillip Island.

Australia and New Zealand are moving to shield vulnerable wildlife as H5N1 avian influenza spreads through the region, with authorities warning that species found nowhere else may be especially exposed. According to the Australian Parliament’s library, Australia remained free of the virus until June 2026, when cases were confirmed along the southern coastline after detection in sub-Antarctic areas the previous October.

Phillip Island Nature Parks is now running what it says is one of the world’s largest little penguin vaccination programmes. During August and September, trained staff are health-checking, microchipping and vaccinating birds in colonies that can be reached safely, with a target of as many as 5,000 penguins. The park says prior research showed encouraging immune responses and no long-term adverse effects in vaccinated birds.

The urgency is clear. The virus has already killed thousands of birds in Australia and has been confirmed in wildlife across several states, while New Zealand has also reported its first case. Environment Canterbury says it is working with the Ministry for Primary Industries on preparedness, and the Department of Conservation is maintaining surveillance and public reporting systems.

Scientists say vaccination is being reserved for species that are both threatened and practically manageable, such as little penguins and, in New Zealand, kākāpō. For many other animals, however, options remain limited.