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Montana - Avian flu in wild birds 2024-2026

Pathfinder

Pathfinder

Editor, Senior Moderator
Detections of Highly Pathogenic Avian Influenza in Wild Birds

Last Modified: November 19, 2024
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https://www.aphis.usda.gov/livestoc...an/avian-influenza/hpai-detections/wild-birds

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Detections of Highly Pathogenic Avian Influenza in Wild Birds

Last Modified: December 23, 2024
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State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Method​
MontanaGallatin11/27/202412/17/2024EA H5N1Snow gooseWild birdMorbidity/Mortality
MontanaGallatin11/27/202412/17/2024EA H5Snow gooseWild birdMorbidity/Mortality
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https://www.aphis.usda.gov/livestoc...an/avian-influenza/hpai-detections/wild-birds
 
February 25, 2025
Sick waterfowl reported on Bighorn River, public urged to stay cautious


HARDIN, Mont. – Montana Fish, Wildlife & Parks said the department has received reports of sick and dead waterfowl along the Bighorn River, stretching from Afterbay to the I-90 bridge near Hardin.

FWP suspects the cause is Highly Pathogenic Avian Influenza. Staff have collected carcasses for testing at FWP’s Wildlife Health Lab in Bozeman, though results may take a few days.
​-snip-
FWP advises the public to avoid contact with sick or dead wildlife and to prevent pets from interacting with affected birds or their droppings. Domestic poultry owners should maintain strict biosecurity to avoid contact between their birds and wild ones.

If you encounter five or more sick or dead wild birds outside the specified Bighorn River area, contact the Billings FWP office at 406-247-2940 or the Wildlife Health Program in Bozeman at 406-577-7880. Report sick or dead domestic birds to the Montana Department of Livestock at 406-444-2976.
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https://www.montanarightnow.com/new...cle_9ddc470f-27b5-5d7d-8eb4-8be1f1c3765a.html
 
Source: https://www.kbzk.com/news/local-news/bird-flu-confirmed-in-canada-goose-found-in-belgrade

Bird flu confirmed in Canada goose found in Belgrade

By: Hevenn Vanh
Posted 22 minutes ago

The Montana Department of Livestock is warning residents of avian influenza, commonly known as bird flu after a Canada goose was found with the disease in Gallatin County.

Officials say, on Feb. 26, the bird was found on Reese Creek Road in Belgrade. It was tested after displaying abnormal behavior despite not being injured.

According to the department, the goose is the latest of 25 bird flu infections identified across the country in the last week.​..
 
Post #5 above:

February 25, 2025, 03:18 PM
February 25, 2025
Sick waterfowl reported on Bighorn River, public urged to stay cautious


HARDIN, Mont. – Montana Fish, Wildlife & Parks said the department has received reports of sick and dead waterfowl along the Bighorn River, stretching from Afterbay to the I-90 bridge near Hardin.

FWP suspects the cause is Highly Pathogenic Avian Influenza. Staff have collected carcasses for testing at FWP’s Wildlife Health Lab in Bozeman, though results may take a few days.
​-snip-​
Click to expand...

FEBRUARY 2025 BIGHORN RIVER WATERFOWL DIE-OFF LINKED TO STARVATION

May 5, 2025 9:15 AM

BILLINGS –After extensive testing, Montana Fish, Wildlife & Parks has concluded that the death of a large number of waterfowl on the Bighorn River in February was caused by starvation.

In February, FWP staff collected mallard, geese and shorebird carcasses from Afterbay to about three miles downstream of the Bighorn Fishing Access Site. The carcasses were transported to FWP’s Wildlife Health Lab in Bozeman for Highly Pathogenic Avian Influenza (HPAI) testing. All carcasses tested negative for HPAI.

Following these negative results, the waterfowl carcasses were sent to the U.S. Geological Survey’s National Wildlife Health Center (NWHC) in Wisconsin for further testing and investigation. No evidence of infectious diseases was detected. Emaciation and starvation were the only consistent ailments found in all sampled carcasses.

FWP’s mid-winter waterfowl surveys for the Bighorn River, conducted in early January, showed higher than average waterfowl numbers, which likely lead to more competition for the limited food in the area. Early 2025 brought extreme cold temperatures and large amounts of snowfall to the region, making the search for food even more challenging.
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https://fwp.mt.gov/homepage/news/20...-river-waterfowl-die-off-linked-to-starvation

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Detections of Highly Pathogenic Avian Influenza in Wild Birds

Last Modified: May 07, 2025
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State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Method
MontanaDeer Lodge12/12/20244/30/2025EA/AM H5N1Great horned owlWild birdMorbidity/Mortality
MontanaBig Horn11/28/20244/30/2025EA/AM H5N1Trumpeter swanWild birdMorbidity/Mortality
MontanaBig Horn12/6/20244/25/2025EA/AM H5N1MallardWild birdHunter harvest
MontanaBig Horn12/13/20241/8/2025EA H5MallardWild birdHunter harvest
MontanaBig Horn12/6/20241/8/2025EA H5Common goldeneyeWild birdHunter harvest
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https://www.aphis.usda.gov/livestoc...an/avian-influenza/hpai-detections/wild-birds
 
Detections of Highly Pathogenic Avian Influenza in Wild Birds

Last Modified: June 11, 2025
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State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification
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MontanaMadison11/18/20246/5/2025EA/AM H5N1Trumpeter swanWild bird
MontanaGallatin4/21/20256/4/2025EA H5Snow gooseWild bird
MontanaGallatin4/21/20256/4/2025EA H5N1Turkey vultureWild bird
MontanaDeer Lodge12/13/20246/3/2025EA/AM H5N1Great horned owlWild bird
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https://www.aphis.usda.gov/livestoc...an/avian-influenza/hpai-detections/wild-birds
 
Detections of Highly Pathogenic Avian Influenza in Wild Birds

Last Modified: July 09, 2025
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State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Method

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MontanaRavalli2/24/20257/3/2025EA/AM H5N1Great horned owlWild birdMorbidity/Mortality
MontanaRavalli2/24/20257/3/2025EA/AM H5N1Great horned owlWild birdMorbidity/Mortality

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https://www.aphis.usda.gov/livestoc...an/avian-influenza/hpai-detections/wild-birds
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Detections of Highly Pathogenic Avian Influenza in Wild Birds

Last Modified: September 09, 2025
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State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Metho​d
MontanaGallatin8/25/20259/4/2025EA H5Great horned owlWild birdMorbidity/Mortality
MontanaGallatin2/25/20257/10/2025EA H5Canada gooseWild birdMorbidity/Mortality
MontanaMissoula11/17/20247/7/2025EA H5N1Great horned owlWild birdMorbidity/Mortality
MontanaMissoula11/17/20247/7/2025EA H5Swan (unidentified)Wild birdMorbidity/Mortality
MontanaLewis and Clark1/14/20257/7/2025EA/AM H5N1Canada gooseWild birdMorbidity/Mortality
MontanaLewis and Clark1/14/20257/7/2025EA/AM H5N1Canada gooseWild birdMorbidity/Mortality
MontanaRavalli2/24/20257/3/2025EA/AM H5N1Great horned owlWild birdMorbidity/Mortality
MontanaRavalli2/24/20257/3/2025EA/AM H5N1Great horned owlWild birdMorbidity/Mortality
MontanaPowell2/14/20257/2/2025EA/AM H5N1Bald eagleWild birdMorbidity/Mortality
MontanaGallatin3/5/20257/2/2025EA H5Bald eagleWild birdMorbidity/Mortality
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MontanaGallatin3/3/20257/2/2025EA/AM H5N1Red-tailed hawkWild birdMorbidity/Mortality
MontanaCascade2/26/20257/2/2025EA/AM H5N1Great horned owlWild birdMorbidity/Mortality
MontanaGallatin3/10/20257/2/2025EA/AM H5N1Red-tailed hawkWild birdMorbidity/Mortality
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https://www.aphis.usda.gov/livestoc...n/avian-influenza/hpai-detections/wild-birds​
 
Detections of Highly Pathogenic Avian Influenza in Wild Birds

Last Modified: October 08, 2025​
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​State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Method
MontanaGallatin9/25/202510/1/2025EA H5Great horned owlWild birdMorbidity/Mortality
MontanaGallatin9/24/202510/1/2025EA H5Canada gooseWild birdMorbidity/Mortality
MontanaGallatin9/16/202510/1/2025EA H5Great horned owlWild birdMorbidity/Mortality
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https://www.aphis.usda.gov/livestoc...an/avian-influenza/hpai-detections/wild-birds
 
Detections of Highly Pathogenic Avian Influenza in Wild Birds

Last Modified: October 14, 2025
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State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Method
MontanaWheatland9/30/202510/9/2025EA H5Great horned owlWild birdMorbidity/Mortality
MontanaYellowstone9/29/202510/9/2025EA H5Canada gooseWild birdMorbidity/Mortality
MontanaFlathead9/28/202510/9/2025EA H5Sandhill craneWild birdMorbidity/Mortality
MontanaYellowstone9/18/202510/9/2025EA H5Red-tailed hawkWild birdMorbidity/Mortality
MontanaGallatin10/1/202510/9/2025EA H5Canada gooseWild birdMorbidity/Mortality
MontanaCarbon9/30/202510/9/2025EA H5Canada gooseWild birdMorbidity/Mortality
MontanaCarbon9/30/202510/9/2025EA H5Great horned owlWild birdMorbidity/Mortality
MontanaGallatin9/18/202510/9/2025EA H5Red-tailed hawkWild birdMorbidity/Mortality
MontanaMissoula9/27/202510/9/2025EA H5Great horned owlWild birdMorbidity/Mortality
MontanaGallatin10/2/202510/8/2025EA H5Canada gooseWild birdMorbidity/Mortality
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https://www.aphis.usda.gov/livestoc...an/avian-influenza/hpai-detections/wild-birds
 
Detections of Highly Pathogenic Avian Influenza in Wild Birds

Last Modified: October 28, 2025
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State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Method​
MontanaMadison10/4/202510/22/2025EA H5Red-breasted gooseWild birdMorbidity/Mortality
MontanaGallatin10/4/202510/22/2025EA H5Red-tailed hawkWild birdMorbidity/Mortality
MontanaGallatin10/9/202510/22/2025EA H5Great horned owlWild birdMorbidity/Mortality
​...

https://www.aphis.usda.gov/livestoc...an/avian-influenza/hpai-detections/wild-birds
 
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