Over one hundred dead white-tailed deer have been reported in the west Missoula Valley. FWP first responded to reports from local fishing guides and landowners who reported numerous dead deer in and along the Clark Fork River and fields near and downstream from Harper’s Bridge. Dead deer have also been found in the Mill Creek area northeast of Frenchtown. Epizootic hemorrhagic disease (EHD) is a potential culprit. EHD is transmitted by a biting midge, or gnat, and generally strikes in late summer and early fall.   The disease event typically ends within a couple weeks of the first hard frost.