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Connecticut - Avian influenza in wild birds 2025-2026

Pathfinder

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

Last Modified: February 11, 2025
...
State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Method
ConnecticutMiddlesex1/27/20252/4/2025EA H5MallardWild birdLive bird
ConnecticutFairfield1/23/20251/31/2025EA H5American black duckWild birdHunter harvest
ConnecticutNew Haven12/12/20241/27/2025EA H5MallardWild birdLive bird
ConnecticutNew Haven12/12/20241/27/2025EA H5MallardWild birdLive bird
ConnecticutNew Haven1/8/20251/27/2025EA H5Ring-necked duckWild birdHunter harvest
ConnecticutNew Haven1/8/20251/27/2025EA H5American black duckWild birdHunter harvest
ConnecticutNew Haven1/8/20251/27/2025EA H5American black duckWild birdHunter harvest

...

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

Last Modified: March 04, 2025
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State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification
ConnecticutNew London02/04/202502/21/2025EA H5Great horned owlWild bird
ConnecticutNew London02/04/202502/21/2025EA H5Red-shouldered hawkWild bird
ConnecticutNew London02/04/202502/21/2025EA H5Ring-billed gullWild bird

...

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

Last Modified: August 06, 2025
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State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Method
ConnecticutFairfield1/22/20257/11/2025EA/AM H5N1Canada gooseWild birdMorbidity/Mortality
ConnecticutNew London1/22/20257/10/2025EA/AM H5N1Hooded merganserWild birdMorbidity/Mortality
ConnecticutNew London1/22/20257/10/2025EA/AM H5N1Canada gooseWild birdMorbidity/Mortalit
...
​​
https://www.aphis.usda.gov/livestoc...an/avian-influenza/hpai-detections/wild-birds
 
Detections of Highly Pathogenic Avian Influenza in Wild Birds

Last Modified: November 18, 2025
...​
State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Method
ConnecticutHartford11/10/202511/13/2025EA H5Black vultureWild birdMorbidity/Mortality
ConnecticutHartford11/10/202511/13/2025EA H5Black vultureWild birdMorbidity/Mortality
ConnecticutHartford11/10/202511/13/2025EA H5Black vultureWild birdMorbidity/Mortality
​...
https://www.aphis.usda.gov/livestoc...an/avian-influenza/hpai-detections/wild-birds
 
Detections of Highly Pathogenic Avian Influenza in Wild Birds

Last Modified: February 03, 2026

State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Method
ConnecticutNew London1/6/20261/26/2026EA H5MallardWild birdLive bird
ConnecticutNew London1/6/20261/26/2026EA H5MallardWild birdLive bird
ConnecticutNew London1/6/20261/26/2026EA H5MallardWild birdLive bird
ConnecticutNew London1/6/20261/26/2026EA H5MallardWild birdLive bird
ConnecticutNew London1/6/20261/26/2026EA H5MallardWild birdLive bird
ConnecticutNew London1/6/20261/26/2026EA H5MallardWild birdLive bird
ConnecticutNew London1/6/20261/26/2026EA H5MallardWild birdLive bird
ConnecticutNew London1/6/20261/26/2026EA H5MallardWild birdLive bird
ConnecticutNew London1/6/20261/26/2026EA H5MallardWild birdLive bird
​...

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

Last Modified: February 11, 2026
...
State County Collection Date Date Detected HPAI Strain Bird Species WOAH Classification Sampling Method
ConnecticutLitchfield2/4/20262/10/2026EA H5Canada gooseWild birdMorbidity/Mortality
ConnecticutLitchfield2/3/20262/9/2026EA H5Canada gooseWild birdMorbidity/Mortality
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
ConnecticutFairfield1/14/20262/2/2026EA H5MallardWild birdLive bird
​...
https://www.aphis.usda.gov/livestoc...an/avian-influenza/hpai-detections/wild-birds
 
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