Hemorrhagic Disease Linked to Deer Mortalities on Flathead Reservation
Recent reports from the Flathead Reservation, particularly around Hot Springs and various locations in Mission Valley, indicate a noticeable increase in deer deaths.
The Confederated Salish and Kootenai Tribes (CSKT) Wildlife Management Program has identified hemorrhagic disease, specifically epizootic hemorrhagic disease (EHD), as the cause of fatalities among white-tailed deer and elk in these areas.
Transmission and Timing of Outbreaks
The viral illness is transmitted primarily by biting midges (genus Culicoides), small hematophagous flies that emerge in late summer to early fall near water bodies.
CSKT officials confirm that the virus has been detected not only on the Reservation but also in adjacent areas, suggesting localized spread consistent with typical EHD outbreaks.
Typically, frost events suppress midge populations, and the recent drop in temperature is expected to curtail the current outbreak, though deer mortalities may continue for a short period.
Wildlife Management and Public Guidance
The CSKT Division of Fish, Wildlife, Recreation and Conservation continues active monitoring of deer health and mortality rates across the Reservation.
Reports of new disease outbreaks beyond the current affected zones should be directed to [email protected] or by calling 406-275-2774.
Biological and Ecological Context
- EHD is a viral disease that causes hemorrhaging, fever, and often rapid death in cervids such as white-tailed deer and elk.
- Outbreaks concentrate near water sources where midges breed and feed, creating hotspots for transmission during warm months.
- While the disease can result in significant localized losses, populations often recover rapidly because outbreaks are typically short-lived and spatially contained.
- Humans are not susceptible to EHD, and the disease does not spread by direct contact between animals but via insect vectors.
Safety and Consumption Advisory
According to CSKT Wildlife Management, venison from deer that appear healthy at the time of harvest remains safe for consumption if properly handled and cooked.
Hunters and consumers are encouraged to practice standard food safety measures and avoid eating meat from animals that appear diseased.
Additional reporting and sources from: Deer deaths on Flathead Reservation linked to hemorrhagic disease
