Subject
- Birds -- Effect of habitat modification on -- Oregon -- Willamette National Forest2
- Forest birds2
- Biogeomorphology -- Mathematical models1
- Bird communities -- Oregon -- H.J. Andrews Experimental Forest1
- Bird communities -- Siskiyou Mountains (Calif. and Or.)1
- Bird populations1
- Bird populations -- Klamath National Forest (Calif. and Or.)1
- Bird populations -- Washington (State)1
- Birds -- Coast Ranges -- Geographical distribution1
- Birds -- Coast Ranges -- Habitat1
- Birds -- Counting -- Washington (State) -- Cedar River Watershed (King County)1
- Birds -- Effect of fires on -- Oregon1
- Birds -- Effect of forest management on -- Oregon -- Willamette National Forest1
- Birds -- Effect of forest management on -- Oregon, Western1
- Birds -- Effect of habitat modification on -- Oregon -- Malheur National Forest1
- Birds -- Effect of logging on -- Oregon, Western1
- Birds -- Habitat -- Northwest, Pacific1
- Birds -- Habitat -- Pacific Coast (U.S.) -- Data processing1
- Birds -- Klamath National Forest (Calif. and Or.) -- Infancy1
- Birds -- Oregon -- Geographical distribution1