Subject
- Oregon State University. College of Agriculture Science -- Periodicals5
- Caspian tern -- Ecology -- Columbia River Estuary (Or. and Wash.)3
- Blue whale -- New Zealand2
- Caspian tern -- Food -- Columbia River Estuary (Or. and Wash.)2
- Chinook salmon2
- Circadian rhythms2
- Double-crested cormorant -- Ecology -- Columbia River Estuary (Or. and Wash.)2
- Fishes -- Behavior -- Oregon2
- Sage grouse -- Habitat -- Oregon -- Hart Mountain National Antelope Refuge2
- Spotted owl2
- Amazon parrots -- Conservation -- Guatemala1
- Amazon parrots -- Guatemala -- Geographical distribution1
- Amazon parrots -- Migration -- Guatemala1
- Animal communication1
- Animal population genetics -- Pacific Coast (North America)1
- Aquatic insects -- Predators of -- Ecology -- Oregon -- Alsea River Watershed1
- Aquatic insects -- Seasonal variations -- Oregon -- Alsea River Watershed1
- Aquatic invertebrates -- Oregon -- Composition1
- Bald eagle -- Ecology -- Oregon1
- Bald eagle -- Food -- Oregon1