26/07/2026
Avian influenza has now been identified in Aotearoa (New Zealand), so let's equip ourselves with knowledge about this viral disease.
Highly Pathogenic Avian Influenza (HPAI) virus subtype H5N1 is a highly infectious viral disease, of which birds are the primary hosts. Incursions occur due to the return of migratory birds, such as hākoakoa (Subantarctic skua), a top avian predator, who typically spend the summer breeding season on the Subantarctic Islands and Rēkohu (Chatham Islands), before migrating north to spend the winter at sea.
The most likely routes of H5N1 infection are saliva, nasal secretions, and faecal-oral transmission. Since the goose/Guangdong-lineage of H5N1 was catapulted onto the global health stage in 1996, H5N1 has killed wild birds and poultry, and mammals, including dairy cattle, cats, Southern elephant seals and sea lions.
The bird species most susceptible to H5N1 are ducks, swans and geese (Anseriformes) and gulls, terns and shorebirds (Charadriiformes). Since its outbreak, penguins (Spheniscidae) have also been affected, including King penguins, Adélie penguins, Gentoo penguins, African penguins and Humboldt penguins.
Clinical signs of H5N1 infection in penguins includes eye mucus discharge, cloudy eyes, apparent blindness, lethargy, an inability to stand, panting, head or whole-body tremors, head tilt, dorsal neck flexion (bending the head forward), oscillations of the eyes, and seizures.
H5N1 infecting humans is rare. Most confirmed cases were linked to people who had intimate contact with infected birds.
Can you expect any changes with Blue Penguins Pukekura tours?
At this time as there have been no confirmed cases of H5N1 within kororā (blue penguins) and no confirmed cases in Ōtākou (Otago), we are operating as per normal with our dusk penguin tours, which are conducted primarily outside on a specialised platform.
What can you do to help?
- Stay on designated boardwalks and pathways when viewing wildlife.
- Do not touch any deceased birds or seals.
- Ensure your dogs are on leashes in potentially infected areas, so they cannot interact with deceased wildlife.
- If you find any deceased wildlife, contact the Ministry for Primary Industries - Biosecurity New Zealand's Exotic Pest and Disease on 0800 80 99 66; the Department of Conservation on 0800 362 468; and the Ministry for Health on 0800 400 569.
Photos: Oscar Thomas and Sian Mair.