New Zealand reports first H5N1 bird flu case in migratory seabird

New Zealand reports first H5N1 bird flu case in migratory seabird

New Zealand has confirmed its first case of the deadly H5N1 bird flu after a migratory seabird was discovered on a beach near the capital, Wellington. Biosecurity Minister Andrew Hoggard announced the finding on Wednesday, identifying the infected bird as a brown skua.

The discovery follows the detection of the virus in Australia in June. Australia was the last continent to report the virus, with H5 confirmed on Heard Island, a sub-Antarctic Australian territory, in late 2025. As of July 15, Australia has recorded 14 confirmed or presumed positive detections of H5 bird flu.

The virulent H5 strain has been spreading through mammal and wild bird populations since 2021. This spread has resulted in millions of deaths and the infection of dairy farms, poultry farms, and some farmworkers.

Minister Hoggard stated that there has been no detection in poultry and no evidence of transmission between wild birds or mass mortality in wildlife within New Zealand. He also noted that the virus represents a low health risk to the general public, as it rarely affects humans unless there is direct, close, and prolonged contact with large numbers of sick birds.

However, the arrival of the virus poses a severe threat to New Zealand's unique biodiversity. Many of the country's wild birds evolved for millions of years without native land mammals. This isolation led to the development of species that are ground-nesting, flightless, and poorly equipped to defend against predators. These birds already face pressures from habitat loss and introduced pests, including feral cats, rats, and stoats.

Brett Gartrell, a professor of wildlife health at Massey University, told Reuters that the potential for the virus to push critically endangered birds toward extinction is a major concern.

"We are incredibly worried about New Zealand's biodiversity because our birds have never had to deal with anything like this before,"

Brett Gartrell, professor of wildlife health at Massey University, via Reuters

Gartrell warned that if the virus spreads too quickly, the core group of birds targeted for vaccination may not be fully immune.

"If it spreads quickly in New Zealand, we could be in trouble,"

Brett Gartrell, professor of wildlife health at Massey University, via Reuters

In response to the threat, health officials have launched a vaccination programme. The initiative targets 300 core breeding birds from five of the most endangered species in the country, including the kakapo and flightless takahe.

New Zealand had been preparing for the arrival of H5N1 prior to this case. According to Minister Hoggard, the government has been working with the poultry industry to establish resilience plans and biosecurity measures. Hoggard suggested that New Zealand may experience a pattern of infection similar to the one seen in neighboring Australia.