Terrestrial Wildlife Diseases

Chronic wasting disease (CWD) has been detected in 37 US states and five Canadian provinces in free-ranging cervids and/or captive cervid facilities.

Elevated ocean temperatures are linked to the development of harmful algal blooms (HABs). Toxins from these blooms may pose health threats to marine organisms, including seabirds. Since 2015, the USGS has worked with a variety of stakeholders to develop testing methods and research projects to better understand the geographic extent, timing and impacts of algal toxins in Alaska marine ecosystems...

The USGS Northern Rocky Mountain Science Center (NOROCK) proudly supports Federal, State, Tribal, and other partners by delivering high-quality data, cutting-edge science, and practical tools to support natural resource management. Below are some of NOROCK’s highlights during fiscal year 2025.

USGS researchers seek to understand the factors influencing the spread and persistence of avian influenza viruses on the landscape. This research also addresses how novel strains of highly pathogenic avian influenza are impacting a larger number and diversity of host species, including waterfowl, shorebirds, raptors and other birds.

USGS researchers are pairing field and laboratory studies to gain deeper insights into the role of Lesser Scaup ( Aythya affinis) in the spread and persistence of avian influenza viruses.

Emergence of avian influenza viruses with the potential to be highly pathogenic to poultry, wild birds, and humans cause serious concern for the global economic and public health sectors. Researchers at the USGS Eastern Ecological Science Center study multiple aspects of avian influenza viruses in wild birds as well as their implications for commercial agriculture with a special emphasis on...

Avian influenza, once largely limited to poultry, is now reshaping wildlife health across North America, affecting wild birds, mammals, and even people. This 2025 Year in Review highlights how USGS science is helping track, understand, and respond to this rapidly evolving disease. From large-scale wildlife die-offs to new tools for detecting and monitoring the virus, USGS research supports...

The sagebrush biome is one of the largest ecosystems in North America. Encompassing nearly one-third of the continental U.S., it provides critical resources for millions of Americans and a home for hundreds of plants and animal species in the West. Natural resource management in sagebrush ecosystems can be complex, and science can support management decisions by providing knowledge and tools to...

Scientists of the USGS National Wildlife Health Center (NWHC) in collaboration with partners have developed risk assessments for  Batrachochytrium salamandrivorans  ( Bsal ) in the United States and are sampling high-risk locations for the fungus.

USGS scientists have developed novel tools and techniques for national white-nose syndrome (WNS) detection and research efforts. Our scientists are monitoring bat populations (NABat) and bat behavior in addition to assessing the impact of WNS on bat populations. USGS is now focusing on disease management strategies to reverse bat declines from WNS.

This research effort is an interagency partnership between U.S. Geological Survey and U.S. Fish and Wildlife Service to model the social-ecological system that encompasses chronic wasting disease management in the United States. Chronic wasting disease (CWD) is a fatal, neurologically degenerative disease that impacts many cervid species in North America (e.g., elk, moose, mule deer, and white...

The Strain and Genetic Online Tissue Repository (SAGOTR) is being developed by the USGS Fort Collins Science Center to document, track, discover, and request physical samples of Chronic Wasting Disease (CWD). SAGOTR connects natural resource managers, tissue repositories, and researchers in one online platform, making it easier to locate and share samples and support research and management of CWD...