Subject
- Northern spotted owl -- Habitat -- Oregon2
- Agricultural pollution -- California -- San Joaquin Valley1
- Agricultural wastes -- Environmental aspects -- California -- Tulare Lake1
- Agriculture -- Environmental aspects -- California1
- American avocet -- Abnormalities -- California -- Tulare Lake1
- American avocet -- California -- Tulare Lake -- Mortality1
- American avocet -- California -- Tulare Lake -- Reproduction1
- American avocet -- Effect of pollution on -- California -- Tulare Lake1
- Amphibians -- Habitat -- Oregon -- Oregon Coast Range1
- Bald eagle -- Oregon1
- Birds -- Coast Ranges -- Geographical distribution1
- Birds -- Coast Ranges -- Habitat1
- Birds -- Oregon -- Geographical distribution1
- Birds -- Oregon -- Habitat1
- Brown pelican -- Behavior -- Columbia River Estuary (Or. and Wash.)1
- Brown pelican -- Behavior -- Oregon -- Sand Island (Clatsop County)1
- Brown pelican -- Effect of human beings on -- Columbia River Estuary (Or. and Wash.)1
- Brown pelican -- Effect of human beings on -- Oregon -- Sand Island (Clatsop County)1
- Brown pelican -- Effect of stress on -- Columbia River Estuary (Or. and Wash.)1
- Brown pelican -- Effect of stress on -- Oregon -- Sand Island (Clatsop County)1