If you want the short answer, avian influenza wild birds Norway is still an active wildlife disease issue in 2026. Highly pathogenic avian influenza, especially H5N1, continues to be detected in wild birds, although the pattern changes with season, species, location and bird movements. Norway saw a particularly high level of HPAI H5N1 in wild birds during the winter of 2025/2026, while spring and summer 2026 brought more sporadic detections across several counties.
The Norwegian Veterinary Institute says the disease was first detected in Norwegian wild birds in 2020 and has since spread across large parts of the country.
That is one reason surveillance matters so much. A dead swan or gull may look like an isolated wildlife event, but testing can show whether it is part of a wider pattern.
Key Takeaways
- Avian influenza remains present in Norwegian wild birds in 2026, with HPAI H5N1 among the viruses detected.
- Winter 2025/2026 brought a particularly high level of HPAI H5N1 in wild birds across Europe and affected Norway.
- Spring and summer 2026 brought sporadic detections in several Norwegian counties.
- Surveillance testing combines samples from apparently healthy birds with testing of sick or dead wildlife.
- Human infection is rare, and no human cases have been confirmed in Norway, but close unprotected contact with infected animals can pose a risk.
- Skrantesjuke and mange in foxes are separate wildlife health issues and require different surveillance methods.
What is avian influenza and why does it spread among wild birds?
Avian influenza, or fugleinfluensa, is caused by influenza A viruses. Wild waterbirds such as ducks, geese, swans, shorebirds and gulls can carry different influenza viruses. Many infections cause little or no visible illness, but highly pathogenic forms can cause severe disease and death in some bird species.
The word “highly pathogenic” can sound confusing. It describes the effect of certain avian influenza viruses in particular poultry testing systems. It does not mean that every infected wild bird will become severely ill, and it does not automatically describe the risk to people.
Wild birds can spread the virus through close contact, contaminated droppings, saliva and other secretions. Shared water, feeding areas and crowded resting places can help the virus move between birds. Migration can then carry infected birds over long distances.
Norway’s coast is especially relevant because many seabirds and waterbirds gather there. Bird density, species mix and seasonal movement can influence where detections appear.
What has changed in Norway during 2026?
The winter of 2025/2026 was a major part of the current picture. The Veterinary Institute reported very high HPAI H5N1 occurrence among wild birds in Europe during that winter, with Norway also affected. Swans and other duck-like birds were particularly exposed.
During spring and summer 2026, detections became more sporadic. Confirmed HPAI H5N1 findings were reported in Nordland, Møre og Romsdal, Trøndelag, Vestfold and Telemark. Most involved waterfowl, although some seabirds were also affected.
The Veterinary Institute’s live overview covers detections from 1 October 2025 through 30 September 2026 and is updated as new information arrives. For readers following avian influenza wild birds Norway, that live surveillance picture is more useful than relying on an old headline.
Why does avian influenza wild birds Norway matter right now?
The main concern is not only the birds that become sick. Wild birds can act as a bridge between wildlife, domestic birds and, in rare situations, mammals.
Norwegian authorities monitor wild birds because infections can spill over into poultry. The disease can also occasionally infect mammals. In 2025 surveillance, HPAI H5 viruses were detected in wild birds and influenza A virus was found in a wider set of samples. A small number of wild mammals were also positive for HPAI.
For people, the situation is different. The Norwegian Institute of Public Health says human infection is very rare and that no human cases have been confirmed in Norway. The general risk to people in Norway has been assessed as very low. Still, close unprotected contact with sick or dead infected animals can create a risk.
So this is mainly an animal health and wildlife surveillance story, but it also has a One Health side. That means animal health, human health and the environment are looked at together instead of treating them as completely separate subjects.
How does surveillance testing work?
Surveillance testing is an early warning system. Scientists and authorities collect samples from selected healthy wild birds, as well as birds that are sick or found dead.
Active surveillance can involve sampling birds that appear healthy. Passive surveillance focuses more on unusual illness, deaths or suspected cases. These two approaches answer different questions and work better together.
Norway participates in an EU/EEA surveillance programme. The Veterinary Institute coordinates avian influenza surveillance for the Norwegian Food Safety Authority, while other organisations and field workers can contribute samples and observations.
Testing does more than confirm whether a bird has the virus. Laboratory work can identify virus subtypes and help researchers follow how viruses are changing. This matters because influenza viruses are constantly evolving.
The 2025 Norwegian surveillance programme examined 880 wild birds for avian influenza. Influenza A virus was detected in 161, while HPAI H5 virus was detected in 77 wild birds. Most HPAI-positive birds identified through passive surveillance were birds that were already sick, dead or euthanised.
What should people do if they find a dead wild bird?
Finding a dead bird does not automatically mean avian influenza is responsible. Birds die from many causes, including injury, disease and collisions.
Still, people should avoid unnecessary contact with sick or dead wild birds, especially where several birds are dying. Norwegian authorities provide specific reporting and handling advice, and local guidance can change when outbreaks are detected.
Do not pick up a suspicious dead bird just to move it somewhere else. Keep children and pets away from areas with multiple dead birds. If reporting is recommended in your area, follow the current instructions from Mattilsynet or your local authority.
How is this different from skrantesjuke and mange in foxes?
Norway tracks several wildlife diseases, but they are not the same problem.
Skrantesjuke, or chronic wasting disease, is a prion disease that affects deer species. The national CWD programme covers animals such as moose, red deer, roe deer and reindeer. It is monitored through a different testing system and has a different transmission pattern from avian influenza.
Mange in foxes is also a separate issue. Mange usually refers to skin disease caused by mites, and it can cause hair loss, itching and poor body condition. It should not be treated as another form of bird flu.
What could happen next with avian influenza in Norway?
The next stage will depend heavily on bird movements and seasonal conditions. Wild bird infections often change as birds migrate, gather at feeding sites or move between breeding and wintering areas.
That means Norway may continue to see scattered detections even after a period with fewer reports. New clusters can also appear when susceptible birds gather in the right conditions.
Researchers will continue watching which species are affected, where detections occur and which virus variants are present.
Why do bird movements matter so much?
Migration makes wildlife disease harder to track than a disease limited to one place. Animal migration can move birds between breeding, feeding and wintering areas. A virus detected in one region may therefore reflect movements that began elsewhere. Norwegian surveillance is connected to European monitoring. It gives authorities context when detections appear and helps them see whether a local finding fits a broader pattern.
Sources Note
This article uses information from the Norwegian Veterinary Institute, Mattilsynet and the Norwegian Institute of Public Health. These sources provide surveillance data, animal-health guidance and public-health information. The article separates confirmed findings from changing or uncertain future patterns.
Frequently Asked Questions
Is avian influenza still present in Norway in 2026?
Yes. HPAI continues to be detected in wild birds in Norway. The number and location of findings can change quickly, so current surveillance data should be checked for the latest picture.
Which wild birds are most affected?
Waterfowl such as swans, ducks and geese are important species to watch, while gulls and other seabirds can also be affected. The species pattern changes over time and by location.
Can wild birds spread bird flu to poultry?
Yes. Infected wild birds can introduce avian influenza viruses to domestic birds. This is why poultry owners are advised to use strong biosecurity measures and follow current Norwegian restrictions.
Can humans catch avian influenza from wild birds?
It is possible but rare. The main concern is close, unprotected contact with infected birds or contaminated material. FHI reports that no human cases have been confirmed in Norway.
Should I touch a dead wild bird?
It is better to avoid unnecessary contact. If there are several dead birds or a suspected outbreak, follow current advice from Mattilsynet or your local authority instead of handling the birds yourself.
Disclaimer
This article is for general educational and informational purposes. Wildlife disease patterns, testing results and local conditions can change as new evidence becomes available. Always check Norwegian authorities for the latest guidance.
