Epizootic hemorrhagic disease and chronic wasting disease both impact deer populations here in North Dakota. EHD is caused by a virus transferred by midges, and CWD is caused by a prion. Both kill infected deer. CWD is very persistent in the environment and has been found in the south central part of the state. North Dakota has a voluntary CWD surveillance program. Hunters are asked to participate by dropping off deer heads at collection sites (https://gf.nd.gov/wildlife/diseases/cwd/surveillance).