12/11/25 – STATE AGENCIES RESPOND TO THIRD POSSIBLE CASE OF HIGHLY PATHOGENIC AVIAN INFLUENZA IN HAWAIʻI

STATE AGENCIES RESPOND TO THIRD POSSIBLE CASE OF HIGHLY PATHOGENIC AVIAN INFLUENZA IN HAWAIʻI

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HONOLULU - Three state agencies remain on alert after a third presumptive case of avian influenza was found in a wild bird - this time in an endangered native duck on Kauaʻi. Preliminary testing performed by the Hawaiʻi State Laboratory showed the bird was infected with an influenza A virus, though confirmation and subtype identification (e.g., H5N1) are pending further analysis by the National Veterinary Services Laboratories (NVSL).

A Koloa Maoli (Hawaiian duck) was found sick on November 26 at the U.S. Fish and Wildlife Service's Hanalei National Wildlife Refuge in Kīlauea, Kauaʻi. The bird died within 24 hours.

H5N1 is a highly infectious and often deadly subtype of influenza A that mainly affects birds. Human infections are rare but can occur with close contact. Hawaiʻi's first detection of H5N1 occurred in November 2024 in a backyard flock on Oʻahu, followed by a hybrid duck found on Oʻahu's North Shore. This year, two additional cases have been confirmed in migratory Koloa Māpu ducks-one on Oʻahu and one on Maui. This Kauaʻi detection is the first potential case in a native bird, likely introduced through infected migratory waterfowl.

The Hawaiʻi Department of Health (DOH), Department of Agriculture & Biosecurity (DAB), and Department of Land and Natural Resources (DLNR) continue coordinated monitoring of public health reports, poultry operations and wild bird populations for any signs of virus spread.

With migratory bird season underway, more birds traveling through the islands may carry avian diseases and it is recommended that the public avoid touching or handling wild birds, especially waterfowl or shorebirds.

If you encounter sick or dead birds, such as waterfowl:

• Avoid touching or handling wild birds, especially waterfowl or shorebirds.
• If capturing a dead or sick bird is necessary, wear gloves, minimize contact and follow biosafety protocols.
• To report multiple or unusual illnesses in poultry, livestock or other wild birds or animals, contact DAB's Animal Industry Division at 808-483-7100, Monday through Friday from 7:45 a.m. to 4:30 p.m., or 808-837-8092 during non-business hours and holidays. Send email to [email protected]

About H5N1/Avian Influenza:

• H5N1 is an avian influenza virus that mainly affects birds; human infections are uncommon but can happen following close contact with infected birds.
• The public risk in Hawaiʻi is currently low, so the DOH does not recommend restricting outdoor activities.
• Routine influenza vaccines in humans do not protect against H5N1; the best prevention is avoiding contact with sick or dead birds.

For more information, visit:

DOH: https://health.hawaii.gov/docd/disease_listing/avian-influenza/

DAB: https://dab.hawaii.gov/ai/ldc/avian-influenza-information/

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Media Contact:

Patti Jette

Communications Specialist

Hawai'i Department of Land and Natural Resources

E-mail: [email protected]