Russ Mitchell's Douglas-fir tussock moth travel/movement study near Enterprise, Oregon.
Photo by: Unknown
Date: June/July 1974
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Division of Timber Management, Insect and Disease Control print collection; Regional Office, Portland, Oregon.
Image provided by USDA Forest Service, Pacific Northwest Region, State and Private Forestry, Forest Health Protection:
www.fs.usda.gov/main/r6/forest-grasslandhealth
