Subject
- 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