National Wildlife Health Center

Multimedia

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

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Map of North America showing locations where chronic wasting disease has been detected.
July 19, 2021

Distribution of Chronic Wasting Disease in North America

Distribution of Chronic Wasting Disease in North America, updated July 19, 2021

Two maps of the United States show the change in risk of Bsal.
July 5, 2021

Maps of Bsal risk in the U.S. comparing pre- and post- action risk

Relative risk maps of combined Bsal risk, comparing (a) pre-action risk (2010–2015), to (b) risk after implementation of surveillance and of importation restrictions on over 200 salamander species. Relative risk scores were scaled to 2010–2015. (c) Change in relative risk score per county as proportion of pre-action risk. Each point is a county, colored by its risk score

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Two photos of schistosome ova in a raccoon pancreas and blood vessel.
July 1, 2021

Photomicrograph from a raccoon found sick and euthanized in Texas

Photomicrograph from a raccoon (Procyon lotor) found sick and euthanized in Texas, US.  (A) A cluster of schistosome ova are present in the pancreas. Ova are thin-shelled and are not operculated. Each viable egg contains a miracidium (arrows). The ova are surrounded by infiltrates of eosinophils, macrophages, and lymphocytes. H&E stain. (B) Adult schistosomes

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Bird with Swollen Eyes and Discharge
June 30, 2021

Bird with Swollen Eyes and Discharge

This bird was found in the Washington, D.C. metro region with swollen eyes and crusty discharge, a sign observed on most birds affected by a May/June 2021 mortality event in the area.

Photographs from raccoon tissue showing long tan nematodes.
May 17, 2021

Nematodes in raccoon tissue

Photographs from a raccoon (Procyon lotor) from Arizona, US.  (A) Large tan nematodes (arrowheads) are present within the subcutaneous tissue and muscle fascia in the distal right forelimb. (B) Closer view of the distal right forelimb showing the large tan nematodes (arrowheads).

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.

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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