National Wildlife Health Center

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Search here for some of our available field imagery and videos.

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Photographs from a wild turkey showing yellow lesions covering the eyelids, head, and neck
April 20, 2021

Photographs from a wild turkey found dead in Minnesota

Photographs from a wild turkey (Meleagris gallopavo) found dead in Minnesota, USA.  (A) There are numerous multifocal to coalescing yellow proliferative lesions covering the eyelids, head, and neck with a region of ulceration and necrosis (*).  (B) Yellow irregular plaques (arrow heads) multifocally cover the oral cavity.

Pink and purple photomicrographs showing lesions in epithelium.
April 20, 2021

Photomicrographs from a wild turkey found dead in Minnesota

Photomicrographs from a wild turkey (Meleagris gallopavo) found dead in Minnesota, USA.  (A) The normal epithelium becomes markedly thickened due to hyperplasia of the stratum spinosum (left to right) with regions of ulceration and crusting (arrow). H&E stain.  (B) Epithelial cells in hyperplastic regions are multifocally swollen (vacuolar degeneration) (

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Map of North America showing locations of chronic wasting disease in red and tribal lands in grey.
April 1, 2021

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 01, 2021.

Map of North America showing locations where chronic wasting disease has been detected.
April 1, 2021

Distribution of Chronic Wasting Disease in North America

Distribution of Chronic Wasting Disease in North America, updated April 01, 2021

Photographs and photomicrographs from an exotic duck showing spleen and liver.
March 21, 2021

Photograph & photomicrographs from exotic duck with avian tuberculosis

Photographs and photomicrographs from an exotic duck.  (A) Grossly, the spleen is enlarged, firm, and yellow (arrow). Throughout the liver are multifocal to coalescing firm tan nodules (arrowheads).  (B) The liver contains multifocal granulomas (asterisk). H&E stain. (C) Hepatic granulomas are characterized by a rim of epithelioid macrophages (arrow) surrounding

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Photomicrographs from a big brown bat nasal cavity and hair follicle.
February 16, 2021

Photomicrographs from a big brown bat (Eptesicus fuscus) from Wisconsi

Photomicrographs from a big brown bat (Eptesicus fuscus) from Wisconsin, USA. H&E stain. (A) Low magnification of a cross section through the nares showing nasal cavity (*), oral mucosa (arrowhead), and haired skin (arrow). (B) Higher magnification showing a normal hair follicle (arrow) surrounded by sebaceous glands. (C) An ulcer with hemorrhage (*) is

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Photographs of mallard duck lungs with arrows pointing to white to tan nodules.
January 21, 2021

Photographs of lungs from a mallard duck found dead in Idaho

Photographs from a mallard duck (Anas platyrhynchos) found dead in Idaho, USA.  (A) The lungs are dark red and have multifocal 1-3 mm diameter white to tan nodules disseminated throughout (arrows).  (B) Cut section of the lung showing the nodules within the parenchyma (arrows).

Photomicrographs of lung from a mallard duck showing fungal hyphae.
January 21, 2021

Photomicrographs of lung from a mallard duck

Photomicrographs from a mallard duck (Anas platyrhynchos) found dead in Idaho, USA.  (A) Multiple granulomas (*) with eosinophilic necrotic centers efface the lung. H&E stain.  (B) Granulomas contain many degenerate heterophils and a few multinucleated giant cells (arrows). H&E stain.  (C) Granulomas (*) in the lung contain numerous fungal hyphae. Inset:

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Four photographs from a red wolf including heartworms in heart and abnormalities on legs.
December 31, 2020

Photographs from a red wolf (Canis rufus) found dead in North Carolina

Photographs from a red wolf (Canis rufus) found dead in North Carolina, USA. (A) Adult heartworms (Dirolfilaria immitis) in the right ventricle and atria of the heart and extending into the pulmonary artery. (B) Hard, haired nodule on the medial surface of the distal radius of the right leg. (C) Bilaterally symmetric bony proliferative lesions on the

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October 10, 2020

WHISPers Overview

The “WHISPers Overview” narrated PowerPoint is an introduction to the features and benefits of the Wildlife Health Information Sharing Partnership-event reporting system (WHISPers), a platform for State, Federal, and Tribal natural resource agency partners to share wildlife health information with each other and the public. Note: All images used in this video were taken

Histology panel from eastern gray squirrel
September 22, 2020

Histology panel from eastern gray squirrel

Photomicrographs from the lung of an eastern gray squirrel (Sciurus carolinensis) found dead in Wisconsin, U.S.A. (A) A bronchiole (arrow) contains numerous neutrophils. H&E stain. Inset: Bronchiolar epithelium is overlain by Gram-negative bacteria. Brown and Hopps stain. Bar = 20 µm. (B) Approximately 30% of the pulmonary parenchyma is replaced by dense

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Necropsy photos from eastern gray squirrel
September 10, 2020

Necropsy photos from eastern gray squirrel

Photographs from an eastern gray squirrel (Sciurus carolinensis) found dead in Wisconsin, U.S.A.  (A) The lung contained multifocal firm red areas (arrows) and multifocal areas of hemorrhage (arrowhead). (B) Firm areas are red to tan on cut section and airways contain mucoid red to tan fluid.