Colorado HPAI Response

2022/2023/2024 HPAI Outbreak

Since March 2022, the Colorado Department of Agriculture has led a response to the outbreak of Highly Pathogenic Avian Influenza (HPAI). 

HPAI continues to pose a threat to Colorado's domestic birds. Bird owners should maintain biosecurity measures such as keeping their flocks away from wild birds and not touching any dead wild birds. 

Domestic bird owners should take extra precautions to avoid introducing the HPAI virus to their flocks, including:

  • preventing interaction between domestic and wild birds,
  • keeping food and water sources away from migrating birds, 
  • and monitoring flocks for signs of illness or death. 

Do you have sick or dead domestic poultry?

Veterinarians and backyard, hobby, and commercial producers should report any suspicious disease events in poultry flocks to the State Veterinarian’s using this form

Report sick or dead domestic birds

Updated guidance for poultry shows

The Colorado State Veterinarian’s office has issued updated guidance for poultry events, such as swaps, meets, and competitions. The guidance asks poultry owners to increase safety precautions and biosecurity practices, monitor their flocks for illness, and report any sick or dead birds to the State Veterinarian’s Office. 

Read the updated guidance

Situation Reports

New situation reports will be posted here on Fridays, if new information is available. 

View all situation reports here (2022, 2023, 2024)

Current Situation Report: #64

Colorado Response to Avian Influenza: Monitoring the state's domestic poultry population to protect birds and consumers. Learn more at ag.colorado.gov/HPAI Image of a group of red hens.
Title slide of the Highly Pathogenic Avian Influenza (HPAI) Webinar for backyard and exhibition producers. Partnership between CDA's Animal Health Division, CSU's Veterinary Diagnostic Laboratories, and Colorado Parks and Wildlife

Watch the webinar



On February 8, 2024, samples submitted to the National Veterinary Services Laboratory tested positive for HPAI in a commercial broiler breeder facility in Delta County.

The State Veterinarian has issued NEW Quarantine Order in parts of Delta County to limit movement of birds in and out of the area.

You can review the Order here: Order of Area Quarantine - Delta01

If you are a commercial or backyard poultry owner in the quarantine area, please report the status of your flock using this online form

If you have additional questions, you can contact the Colorado State Veterinarian’s Office at (303) 869-9130.

Please note: this information is being collected for tracking purposes only to ensure the health of flocks throughout the Quarantine Area. Your voluntary participation is encouraged so we can follow up with you in case of additional detections of HPAI.



Wild bird mortalities

HPAI is actively circulating in wild birds across Colorado. Wild birds may be infected with avian influenza without showing symptoms. Learn more about HPAI and wild birds from Colorado Parks and Wildlife

Coloradans are asked not to touch any dead birds they find on public lands and not to walk on ice to retrieve any carcasses. Do not handle any dead or dying birds. 

Colorado Parks and Wildlife is aware of and tracking multiple wild bird mortalities. If you find three or more dead wild birds in a specific area within a two week period, you may notify your local CPW office.

For individual carcasses found on private property, if necessary, members of the public may wear a mask and gloves to pick up a carcass, immediately double bag it, and place the bags in municipal trash. Discard gloves and mask and wash your hands immediately afterwards.

HPAI and Wild Birds - Colorado Parks and Wildlife

Mammalian detections

There are many species of animals potentially susceptible to HPAI. In addition to birds and poultry, H5N1 viruses have been detected in some mammals. Infection may cause illness, including severe disease and death in some cases. The USDA is tracking mammalian detections on the national level.

In Colorado, CDA is coordinating the response to detections in wild animals with the Department of Natural Resources and Colorado Parks and Wildlife. You can see the Colorado detections in the map and spreadsheet below. 

Companion animals

Although the risk is lower than it is to birds and cases are rare, domestic animals (e.g., cats or dogs) could become infected with avian flu if they go outside and eat or are exposed to sick or dead birds infected with avian flu viruses, or an environment contaminated with feces of infected birds.

People should avoid contact between their pets and wild birds or areas contaminated with avian flu virus. I

If you suspect your pet may have been exposed to HPAI, and is showing symptoms of illness, contact your veterinarian and monitor yourself for symptoms. 

Human Detections

There have been rare cases of human infection with avian influenza. More information can be found at the CDC website

Color coding legend for HPAI map

Blue Counties = Positive wild bird cases
Red Counties = Positive domestic bird cases
Purple Counties = Positive cases in both domestic and wild birds 
Yellow Counties = Positive mammal cases
Green counties = Positive cases in mammal cases and domestic or wild birds 

 Click on each county for full details.