Distribution of Chronic Wasting Disease in North America, in Relation to Tribal Lands in the Conterminous United States. Updated on April 17, 2025.
Bryan Richards (Former Employee)
Science and Products
Expanding Distribution of Chronic Wasting Disease
Chronic wasting disease (CWD) has been detected in 36 US states and five Canadian provinces in free-ranging cervids and/or commercial captive cervid facilities. CWD has been detected in free-ranging cervids in 36 states and four provinces and in captive cervid facilities in 22 states and three provinces.
Avian Influenza Surveillance
The USGS National Wildlife Health Center (NWHC) conducts surveillance in wild birds to facilitate early detection and situational awareness for high consequence pathogens, including highly pathogenic avian influenza (HPAI) viruses.
Application of a systems approach for management of chronic wasting disease
The USGS National Wildlife Health Center, Montana Cooperative Wildlife Research Unit, Ventana Systems, Inc. , and the Wisconsin Department of Natural Resources (WIDNR) are applying a systems approach to map and model the complex relationships among ecological, epidemiological, social, and political processes affecting CWD. Through a participatory modeling process, we gathered subject matter...
Examining PRNP gene frequencies and ‘resistance’ to chronic wasting disease
Multiple studies have demonstrated that various alleles of the cervid prion protein (PRNP) gene affect chronic wasting disease (CWD) progression.
Distribution of Highly Pathogenic Avian Influenza in North America, 2021/2022
The first 2021/2022 detection of Eurasian strain (EA) highly pathogenic avian influenza (HPAI) H5N1 in North America occurred in December 2021 in Newfoundland and Labrador, Canada. Subsequently, HPAI EA H5 and EA H5N1 viruses have been confirmed in wild birds, backyard flocks, commercial poultry facilities, and wild mammals in both Canada and the United States. This HPAI distribution map will be...
SARS-CoV-2 in Wildlife
As SARS-CoV-2, the virus that causes COVID-19 in humans, continues to spread globally, questions have emerged about the potential for humans to transmit the virus to North American wildlife, its potential effects on native wildlife populations, and the resultant possibility and consequences of establishing a persistent wildlife reservoir. Recent studies have detected SARS-CoV-2 in escaped or wild...
Chronic Wasting Disease
Chronic wasting disease (CWD) is an emerging infectious disease that is fatal to free-ranging and captive animals in Cervidae, the deer family. CWD is one member of a family of diseases called transmissible spongiform encephalopathies (TSEs), and is thought to be caused by prions. CWD is the only TSE known to affect free-ranging wildlife.
Distribution of CWD in Relation to Tribal Lands in the U.S.
Distribution of Chronic Wasting Disease in North America, in Relation to Tribal Lands in the Conterminous United States. Updated on April 17, 2025.
Distribution of Chronic Wasting Disease in North America
Distribution of Chronic Wasting Disease in North America, updated April 11, 2025.
Distribution of Chronic Wasting Disease in North America, updated April 11, 2025.
Chronic wasting disease: change in documented distribution in North America 2000-2024
Animated GIF showing changes in distribution of chronic wasting disease in North America from 2000-2024 as documented at the end of each year. Individual files of yearly maps are available at https://doi.org/10.5066/P9HQKKFO.
Animated GIF showing changes in distribution of chronic wasting disease in North America from 2000-2024 as documented at the end of each year. Individual files of yearly maps are available at https://doi.org/10.5066/P9HQKKFO.
NWHC Wildlife Health Bulletin - Avian Influenza Update
USGS National Wildlife Health Center
Wildlife Health Bulletin 2025-01
Summary
USGS National Wildlife Health Center
Wildlife Health Bulletin 2025-01
Summary
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, 2021-2025
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in wild birds the United States, by county, 2021-2025. Updated February 10, 2025.
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in wild birds the United States, by county, 2021-2025. Updated February 10, 2025.
Update for the North American Wildlife and Natural Resources Conference from the USGS National Wildlife Health Center - March 2024
linkUpdate for the North American Wildlife and Natural Resources Conference from the USGS National Wildlife Health Center - March 2024
Contents
Update for the North American Wildlife and Natural Resources Conference from the USGS National Wildlife Health Center - March 2024
linkUpdate for the North American Wildlife and Natural Resources Conference from the USGS National Wildlife Health Center - March 2024
Contents
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, in Relation to U.S. Fish & Wildlife Service Refuges and National Park Service Lands, 2021/2022
linkDistribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, in Relation to U.S. Fish & Wildlife Service Refuges and National Park Service Lands, 2021/2022. Updated November 27, 2022.
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, in Relation to U.S. Fish & Wildlife Service Refuges and National Park Service Lands, 2021/2022
linkDistribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, in Relation to U.S. Fish & Wildlife Service Refuges and National Park Service Lands, 2021/2022. Updated November 27, 2022.
General Guidance for Communicating about SARS-CoV-2 in Wildlife
As SARS-CoV-2, the virus that causes COVID-19 in humans, continues to spread globally, questions have emerged about the potential for humans to transmit the virus to North American wildlife, its potential impacts on native wildlife populations, and the resultant possibility and consequences of establishing a persistent wildlife reservoir.
As SARS-CoV-2, the virus that causes COVID-19 in humans, continues to spread globally, questions have emerged about the potential for humans to transmit the virus to North American wildlife, its potential impacts on native wildlife populations, and the resultant possibility and consequences of establishing a persistent wildlife reservoir.
White-tailed deer in snow
A white-tailed deer (Odocoileus virginianus) in a snowy field in front of forest in Wisconsin.
A white-tailed deer (Odocoileus virginianus) in a snowy field in front of forest in Wisconsin.
Red fox (Vulpes vulpes) in prairie
A red fox (Vulpes vulpes) at the USGS National Wildlife Health Center prairie.
A red fox (Vulpes vulpes) at the USGS National Wildlife Health Center prairie.
Science and Products
Expanding Distribution of Chronic Wasting Disease
Chronic wasting disease (CWD) has been detected in 36 US states and five Canadian provinces in free-ranging cervids and/or commercial captive cervid facilities. CWD has been detected in free-ranging cervids in 36 states and four provinces and in captive cervid facilities in 22 states and three provinces.
Avian Influenza Surveillance
The USGS National Wildlife Health Center (NWHC) conducts surveillance in wild birds to facilitate early detection and situational awareness for high consequence pathogens, including highly pathogenic avian influenza (HPAI) viruses.
Application of a systems approach for management of chronic wasting disease
The USGS National Wildlife Health Center, Montana Cooperative Wildlife Research Unit, Ventana Systems, Inc. , and the Wisconsin Department of Natural Resources (WIDNR) are applying a systems approach to map and model the complex relationships among ecological, epidemiological, social, and political processes affecting CWD. Through a participatory modeling process, we gathered subject matter...
Examining PRNP gene frequencies and ‘resistance’ to chronic wasting disease
Multiple studies have demonstrated that various alleles of the cervid prion protein (PRNP) gene affect chronic wasting disease (CWD) progression.
Distribution of Highly Pathogenic Avian Influenza in North America, 2021/2022
The first 2021/2022 detection of Eurasian strain (EA) highly pathogenic avian influenza (HPAI) H5N1 in North America occurred in December 2021 in Newfoundland and Labrador, Canada. Subsequently, HPAI EA H5 and EA H5N1 viruses have been confirmed in wild birds, backyard flocks, commercial poultry facilities, and wild mammals in both Canada and the United States. This HPAI distribution map will be...
SARS-CoV-2 in Wildlife
As SARS-CoV-2, the virus that causes COVID-19 in humans, continues to spread globally, questions have emerged about the potential for humans to transmit the virus to North American wildlife, its potential effects on native wildlife populations, and the resultant possibility and consequences of establishing a persistent wildlife reservoir. Recent studies have detected SARS-CoV-2 in escaped or wild...
Chronic Wasting Disease
Chronic wasting disease (CWD) is an emerging infectious disease that is fatal to free-ranging and captive animals in Cervidae, the deer family. CWD is one member of a family of diseases called transmissible spongiform encephalopathies (TSEs), and is thought to be caused by prions. CWD is the only TSE known to affect free-ranging wildlife.
Distribution of CWD in Relation to Tribal Lands in the U.S.
Distribution of Chronic Wasting Disease in North America, in Relation to Tribal Lands in the Conterminous United States. Updated on April 17, 2025.
Distribution of Chronic Wasting Disease in North America, in Relation to Tribal Lands in the Conterminous United States. Updated on April 17, 2025.
Distribution of Chronic Wasting Disease in North America
Distribution of Chronic Wasting Disease in North America, updated April 11, 2025.
Distribution of Chronic Wasting Disease in North America, updated April 11, 2025.
Chronic wasting disease: change in documented distribution in North America 2000-2024
Animated GIF showing changes in distribution of chronic wasting disease in North America from 2000-2024 as documented at the end of each year. Individual files of yearly maps are available at https://doi.org/10.5066/P9HQKKFO.
Animated GIF showing changes in distribution of chronic wasting disease in North America from 2000-2024 as documented at the end of each year. Individual files of yearly maps are available at https://doi.org/10.5066/P9HQKKFO.
NWHC Wildlife Health Bulletin - Avian Influenza Update
USGS National Wildlife Health Center
Wildlife Health Bulletin 2025-01
Summary
USGS National Wildlife Health Center
Wildlife Health Bulletin 2025-01
Summary
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, 2021-2025
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in wild birds the United States, by county, 2021-2025. Updated February 10, 2025.
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in wild birds the United States, by county, 2021-2025. Updated February 10, 2025.
Update for the North American Wildlife and Natural Resources Conference from the USGS National Wildlife Health Center - March 2024
linkUpdate for the North American Wildlife and Natural Resources Conference from the USGS National Wildlife Health Center - March 2024
Contents
Update for the North American Wildlife and Natural Resources Conference from the USGS National Wildlife Health Center - March 2024
linkUpdate for the North American Wildlife and Natural Resources Conference from the USGS National Wildlife Health Center - March 2024
Contents
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, in Relation to U.S. Fish & Wildlife Service Refuges and National Park Service Lands, 2021/2022
linkDistribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, in Relation to U.S. Fish & Wildlife Service Refuges and National Park Service Lands, 2021/2022. Updated November 27, 2022.
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, in Relation to U.S. Fish & Wildlife Service Refuges and National Park Service Lands, 2021/2022
linkDistribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, in Relation to U.S. Fish & Wildlife Service Refuges and National Park Service Lands, 2021/2022. Updated November 27, 2022.
General Guidance for Communicating about SARS-CoV-2 in Wildlife
As SARS-CoV-2, the virus that causes COVID-19 in humans, continues to spread globally, questions have emerged about the potential for humans to transmit the virus to North American wildlife, its potential impacts on native wildlife populations, and the resultant possibility and consequences of establishing a persistent wildlife reservoir.
As SARS-CoV-2, the virus that causes COVID-19 in humans, continues to spread globally, questions have emerged about the potential for humans to transmit the virus to North American wildlife, its potential impacts on native wildlife populations, and the resultant possibility and consequences of establishing a persistent wildlife reservoir.
White-tailed deer in snow
A white-tailed deer (Odocoileus virginianus) in a snowy field in front of forest in Wisconsin.
A white-tailed deer (Odocoileus virginianus) in a snowy field in front of forest in Wisconsin.
Red fox (Vulpes vulpes) in prairie
A red fox (Vulpes vulpes) at the USGS National Wildlife Health Center prairie.
A red fox (Vulpes vulpes) at the USGS National Wildlife Health Center prairie.