Corvallis Audubon Society

http://audubon.corvallis.or.us/

William L. Finley National Wildlife Refuge

https://www.fws.gov/refuge/william_l_finley/

Oregon Field Ornithologists

http://www.orbirds.org/

U.S. Fish & Wildlife Service, Division of Migratory Birds

https://www.fws.gov/Pacific/migratorybirds/index.html

Oregon Department of Fish & Wildlife, Wildlife Viewing, Birds

https://myodfw.com/wildlife-viewing/species/birds