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Images from the National Wildlife Health Center.

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Map of North America showing locations of chronic wasting disease in red and tribal lands in grey.
Distribution of CWD in Relation to Tribal Lands in the U.S.
Distribution of CWD in Relation to Tribal Lands in the U.S.
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.

Map of North America showing locations where chronic wasting disease has been detected.
Distribution of Chronic Wasting Disease in North America
Distribution of Chronic Wasting Disease in North America
Distribution of Chronic Wasting Disease in North America

Distribution of Chronic Wasting Disease in North America, updated April 11, 2025.

GIF with maps showing chronic wasting disease distribution in North America prior to 2000 and yearly from 2004-2024.
Chronic wasting disease: change in documented distribution in North America 2000-2024
Chronic wasting disease: change in documented distribution in North America 2000-2024
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.

Map showing current distribution of Highly Pathogenic Avian Influenza virus detections in wild birds in the United States.
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, 2021-2025
Distribution of Highly Pathogenic Avian Influenza H5 and H5N1 in North America, 2021-2025
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.

NWHC modernization
NWHC modernization
NWHC modernization
NWHC modernization

The front elevation showcases a combination of glass and metal elements, reflecting a contemporary aesthetic. WHC will be a single, integrated, multistory, state-of-the-art building that will include offices, laboratories (BSL-2 and BSL-3), and vivarium
Picture provide by :Julia Lankton
Deputy Center Director

The front elevation showcases a combination of glass and metal elements, reflecting a contemporary aesthetic. WHC will be a single, integrated, multistory, state-of-the-art building that will include offices, laboratories (BSL-2 and BSL-3), and vivarium
Picture provide by :Julia Lankton
Deputy Center Director

Conceptual illustration of the future USGS National Wildlife Health Center, courtesy of Flad Architects
Conceptual illustration of the future USGS National Wildlife Health Center, courtesy of Flad Architects
Conceptual illustration of the future USGS National Wildlife Health Center, courtesy of Flad Architects
Conceptual illustration of the future USGS National Wildlife Health Center, courtesy of Flad Architects

NWHC modernization overhead view, The image showcases an overhead view of the NWHC modernization project for the microsite homepage. Its highlighting the contemporary structures integrated into a vibrant landscape. Provided by: Lankton, Julia

NWHC modernization overhead view, The image showcases an overhead view of the NWHC modernization project for the microsite homepage. Its highlighting the contemporary structures integrated into a vibrant landscape. Provided by: Lankton, Julia

Dr. LeAnn White has been selected as the new Center Director of the USGS National Wildlife Health Center (NWHC)
Dr. LeAnn White has been selected as the new Center Director of the USGS National Wildlife Health Center (NWHC)
Dr. LeAnn White has been selected as the new Center Director of the USGS National Wildlife Health Center (NWHC)
Dr. LeAnn White has been selected as the new Center Director of the USGS National Wildlife Health Center (NWHC)

Dr. LeAnn White has been selected as the new Center Director of the USGS National Wildlife Health Center (NWHC)

Photographs from a mountainous star coral (Montastraea cavernosa) losing tissue to disease in Florida, USA.
Photographs from a mountainous star coral (Montastraea cavernosa) losing tissue to disease in Florida, USA.
Photographs from a mountainous star coral (Montastraea cavernosa) losing tissue to disease in Florida, USA.
Photographs from a mountainous star coral (Montastraea cavernosa) losing tissue to disease in Florida, USA.

Photographs from a mountainous star coral (Montastraea cavernosa) losing tissue to disease in Florida, USA.  (A) Colony in situ showing bare white, recently denuded skeleton with no turf algae growth (arrowheads) with dark discoloration along the active tissue loss margins (arrows).

Photographs from a mountainous star coral (Montastraea cavernosa) losing tissue to disease in Florida, USA.  (A) Colony in situ showing bare white, recently denuded skeleton with no turf algae growth (arrowheads) with dark discoloration along the active tissue loss margins (arrows).

Photomicrographs from a mountainous star coral (Montastraea cavernosa) in Florida, USA.
Photomicrographs from a mountainous star coral (Montastraea cavernosa) in Florida, USA.
Photomicrographs from a mountainous star coral (Montastraea cavernosa) in Florida, USA.
Photomicrographs from a mountainous star coral (Montastraea cavernosa) in Florida, USA.

Photomicrographs from a mountainous star coral (Montastraea cavernosa) in Florida, USA. (A) A large cluster of filamentous bacteria are within the gastrovascular space and gastrodermis (asterisk) and extending through mesoglea (arrow) with necrosis and loss of the surface gastrodermis (arrowheads). H&E stain.  Scale bar 200 μm.

Photomicrographs from a mountainous star coral (Montastraea cavernosa) in Florida, USA. (A) A large cluster of filamentous bacteria are within the gastrovascular space and gastrodermis (asterisk) and extending through mesoglea (arrow) with necrosis and loss of the surface gastrodermis (arrowheads). H&E stain.  Scale bar 200 μm.

Photomicrographs from a sea otter (Enhydra lutris) found dead in Washington State, USA.
Photomicrographs from a sea otter (Enhydra lutris) found dead in Washington State, USA.
Photomicrographs from a sea otter (Enhydra lutris) found dead in Washington State, USA.
Photographs from a Little Brown Bat (Myotis lucifugus) found dead in Montana, USA.
Photographs from a Little Brown Bat (Myotis lucifugus) found dead in Montana, USA.
Photographs from a Little Brown Bat (Myotis lucifugus) found dead in Montana, USA.
Photographs from a Little Brown Bat (Myotis lucifugus) found dead in Montana, USA.

Photographs from a Little Brown Bat (Myotis lucifugus) found dead in Montana, USA (A, B, D). (A) Multiple foci of depigmentation (arrowheads) measuring up to 3 mm in diameter are present on the patagia. (B) Under ultraviolet light, there is a single pinpoint focus of orange fluorescence (arrowhead) and multiple pinpoint foci of blue fluorescence (arrow).

Photographs from a Little Brown Bat (Myotis lucifugus) found dead in Montana, USA (A, B, D). (A) Multiple foci of depigmentation (arrowheads) measuring up to 3 mm in diameter are present on the patagia. (B) Under ultraviolet light, there is a single pinpoint focus of orange fluorescence (arrowhead) and multiple pinpoint foci of blue fluorescence (arrow).

Photomicrographs from little brown bats, one with square-eared anomaly.
Photomicrographs from little brown bats, one with square-eared anomaly, found dead in Montana, USA.
Photomicrographs from little brown bats, one with square-eared anomaly, found dead in Montana, USA.
Photomicrographs from little brown bats, one with square-eared anomaly, found dead in Montana, USA.

Photomicrographs from an unaffected Little Brown Bat (M. lucifugus; A-B) and Little Brown Bat found dead in Montana, USA with the square-eared anomaly (C-E). Periodic Acid Schiff-Hematoxylin. (A) Pinna of an unaffected Little Brown Bat showing the epidermis (e and arrow), dermis (d) and central elastic cartilage plate (c).

Photomicrographs from an unaffected Little Brown Bat (M. lucifugus; A-B) and Little Brown Bat found dead in Montana, USA with the square-eared anomaly (C-E). Periodic Acid Schiff-Hematoxylin. (A) Pinna of an unaffected Little Brown Bat showing the epidermis (e and arrow), dermis (d) and central elastic cartilage plate (c).

Intestinal serosa from a Western gull showing Acanthocephaliasis.
Photographs from a Western gull (Larus occidentalis) in California, USA
Photographs from a Western gull (Larus occidentalis) in California, USA
Photographs from a Western gull (Larus occidentalis) in California, USA

Photographs from a Western gull (Larus occidentalis) in California, USA. (A) On the intestinal serosa are multifocal 1-mm diameter firm white nodules (arrows). A white fungal plaque (white arrow) also overlies the serosa.

Photographs from a Western gull (Larus occidentalis) in California, USA. (A) On the intestinal serosa are multifocal 1-mm diameter firm white nodules (arrows). A white fungal plaque (white arrow) also overlies the serosa.

Photomicrographs of the small intestine from a Western gull showing parasites in intestinal wall.
Photomicrographs of the small intestine from a Western gull (Larus occidentalis) from California, USA
Photomicrographs of the small intestine from a Western gull (Larus occidentalis) from California, USA
Photomicrographs of the small intestine from a Western gull (Larus occidentalis) from California, USA

Photomicrographs of the small intestine from a Western gull (Larus occidentalis) from California, USA. H & E stain. (A) Expanding the small intestinal lumen and distorting intestinal villi are multiple adult metazoan parasites (arrow); similar parasites are within cavitations in the intestinal wall or serosa (arrowhead).

Photomicrographs of the small intestine from a Western gull (Larus occidentalis) from California, USA. H & E stain. (A) Expanding the small intestinal lumen and distorting intestinal villi are multiple adult metazoan parasites (arrow); similar parasites are within cavitations in the intestinal wall or serosa (arrowhead).

Photos showing discard on raccoon eye, crusty nasal planum, and lesions in airway.
Photographs and photomicrographs from a Common Raccoon (Procyon lotor) found dead in Wisconsin
Photographs and photomicrographs from a Common Raccoon (Procyon lotor) found dead in Wisconsin
Photographs and photomicrographs from a Common Raccoon (Procyon lotor) found dead in Wisconsin

Photographs and photomicrographs from a Common Raccoon (Procyon lotor) found dead in Wisconsin, USA. (A) There is green-gray mucoid discharge around the eyes and the nasal planum is crusty (arrows).

Photographs and photomicrographs from a Common Raccoon (Procyon lotor) found dead in Wisconsin, USA. (A) There is green-gray mucoid discharge around the eyes and the nasal planum is crusty (arrows).

Images of tissues from a gull showing lesions and bacteria.
Tissue from a gull (Larus sp) from Wisconsin
Tissue from a gull (Larus sp) from Wisconsin
Tissue from a gull (Larus sp) from Wisconsin

Tissue from a gull (Larus sp) from Wisconsin. (A) Diffusely the pericardium (star) is greatly expanded by fibrin, edema and necrotic debris (H&E). (B) Lymphoplasmacytic myositis (arrows) creating linear lesions along fascial planes of the pectoral skeletal muscle (H&E).

Tissue from a gull (Larus sp) from Wisconsin. (A) Diffusely the pericardium (star) is greatly expanded by fibrin, edema and necrotic debris (H&E). (B) Lymphoplasmacytic myositis (arrows) creating linear lesions along fascial planes of the pectoral skeletal muscle (H&E).

Photomicrographs of the plagiopatagium from a Little Brown Bat showing nematodes.
Photomicrographs of the plagiopatagium from a Little Brown Bat
Photomicrographs of the plagiopatagium from a Little Brown Bat
Photomicrographs of the plagiopatagium from a Little Brown Bat

Photomicrographs of the plagiopatagium from a Little Brown Bat (Myotis lucifugus) captured live in Wyoming, U.S.A. (A) Adult nematodes (asterisks) are present in the dermis. They are filled with larval nematodes (arrowhead). The overlying epidermis is hyperplastic (arrow). H&E stain.

Photomicrographs of the plagiopatagium from a Little Brown Bat (Myotis lucifugus) captured live in Wyoming, U.S.A. (A) Adult nematodes (asterisks) are present in the dermis. They are filled with larval nematodes (arrowhead). The overlying epidermis is hyperplastic (arrow). H&E stain.

Gross photographs from a Cooper’s hawk showing Air sac overlying the lung and liver with yellow to green, irregular nodules.
Gross photographs from a Cooper’s hawk (Accipiter cooperii)
Gross photographs from a Cooper’s hawk (Accipiter cooperii)
Gross photographs from a Cooper’s hawk (Accipiter cooperii)

Gross photographs from a Cooper’s hawk (Accipiter cooperii). (A) Air sac overlying the lung and liver have multiple yellow to green, irregular nodules (arrows). (B) Liver (asterisk) has multiple 1 mm, round to irregular, tan nodules in addition to innumerable miliary foci.

Gross photographs from a Cooper’s hawk (Accipiter cooperii). (A) Air sac overlying the lung and liver have multiple yellow to green, irregular nodules (arrows). (B) Liver (asterisk) has multiple 1 mm, round to irregular, tan nodules in addition to innumerable miliary foci.

Photomicrographs showing lesions in Cooper’s hawk soft palate and lung.
Photomicrographs of Cooper’s hawk soft palate and lung
Photomicrographs of Cooper’s hawk soft palate and lung
Photomicrographs of Cooper’s hawk soft palate and lung

(A) Soft palate of a Cooper’s hawk (Accipiter cooperii). The submucosa is expanded by a myriad of epithelioid macrophages (arrow) surrounding multinucleated giant cells centered on a necrotic center (asterisk). H&E stain. Insert: Intrahistiocytic and extracellular acid-fast bacilli.

(A) Soft palate of a Cooper’s hawk (Accipiter cooperii). The submucosa is expanded by a myriad of epithelioid macrophages (arrow) surrounding multinucleated giant cells centered on a necrotic center (asterisk). H&E stain. Insert: Intrahistiocytic and extracellular acid-fast bacilli.

Healthy elkhorn coral tissue next to elkhorn coral with tissue loss shown by atrophic and thin body wall.
Photomicrograph from a healthy example of elkhorn coral side-by-side with elkhorn coral found with multifocal tissue loss
Photomicrograph from a healthy example of elkhorn coral side-by-side with elkhorn coral found with multifocal tissue loss
Photomicrograph from a healthy example of elkhorn coral side-by-side with elkhorn coral found with multifocal tissue loss

(A) Photomicrograph from a healthy example of elkhorn coral (Acropora palmata). Tall columnar epidermis (E), gastrodermis (g), skeletal space (s), gastrovascular cavity (gvc), and calicodermis (white arrowhead). H&E stain.

(A) Photomicrograph from a healthy example of elkhorn coral (Acropora palmata). Tall columnar epidermis (E), gastrodermis (g), skeletal space (s), gastrovascular cavity (gvc), and calicodermis (white arrowhead). H&E stain.

Photomicrograph at low magnification from elkhorn coral showing flatworm along body wall.
Photomicrograph at low magnification from elkhorn coral (Acropora palmata) found with multifocal tissue loss in the Dominican Republic
Photomicrograph at low magnification from elkhorn coral (Acropora palmata) found with multifocal tissue loss in the Dominican Republic
Photomicrograph at low magnification from elkhorn coral (Acropora palmata) found with multifocal tissue loss in the Dominican Republic

Photomicrograph at low magnification from elkhorn coral (Acropora palmata) found with multifocal tissue loss in the Dominican Republic. A flatworm (fw) is present along a multifocally ulcerated coral surface body wall (c) along one polyp. A small amount of cellular debris can be seen within the pharynx (p) of the flatworm.

Photomicrograph at low magnification from elkhorn coral (Acropora palmata) found with multifocal tissue loss in the Dominican Republic. A flatworm (fw) is present along a multifocally ulcerated coral surface body wall (c) along one polyp. A small amount of cellular debris can be seen within the pharynx (p) of the flatworm.

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