Subject
- Northern spotted owl -- Conservation -- Oregon, Western2
- Northern spotted owl -- Habitat -- Oregon2
- Northern spotted owl -- Oregon, Western -- Reproduction2
- Animal migration -- Oregon1
- Barred owl -- Ecology -- Oregon, Western1
- Barred owl -- Food -- Oregon, Western1
- Barred owl -- Habitat -- Oregon, Western1
- Barred owl -- Oregon -- Geographic distribution1
- Barred owl -- Oregon, Western -- Reproduction1
- Birds of prey -- Oregon -- Geographical distribution1
- Competition (Biology) -- Oregon1
- Forest management -- Environmental aspects -- Oregon1
- Forest management -- Oregon1
- Forest policy -- Oregon1
- Forests and forestry -- Fire management -- Environmental aspects -- Oregon, Western1
- Forests and forestry -- Northwest, Pacific1
- Great horned owl -- Cascade Range1
- Great horned owl -- Oregon1
- Habitat (Ecology) -- Oregon1
- Leporidae -- Oregon -- H.J. Andrews Experimental Forest -- Geographical distribution1