Subject
- Birds -- Ecology -- Oregon -- Willamette River Valley1
- Birds -- Habitat -- Oregon -- Willamette River Valley1
- Birds -- Oregon -- Willamette River Valley1
- Cavity-nesting birds -- Effect of forest management on -- Oregon, Western1
- Cavity-nesting birds -- Habitat -- Oregon, Western1
- Cavity-nesting birds -- Oregon, Western1
- Forest birds -- Effect of logging on -- Oregon -- Davis Lake (Deschutes County)1
- Forest birds -- Habitat -- Oregon -- Davis Lake (Deschutes County)1
- Herbicides -- Environmental aspects -- Oregon1
- Herbivores -- Oregon1
- Logging -- Environmental aspects -- Oregon -- Davis Lake (Deschutes County)1
- Mule deer -- Oregon1
- Niche (Ecology) -- Oregon -- Willamette River Valley1
- Oregon oak -- Oregon -- Willamette River Valley1
- Phoradendron -- Oregon -- Willamette River Valley1
- Red deer -- Oregon1
- Snags (Forestry) -- Oregon, Western1
- Songbirds -- Habitat -- Oregon -- Trask River Watershed1
- Songbirds -- Oregon -- Trask River Watershed1
- Vegetation management -- Oregon1