Coccyzus americanus occidentalis

Halterman, M., M.J. Johnson, J.A. Holmes, and S.A. Laymon. 2015. A natural history summary and survey protocol for the Western Distinct Population Segment of the Yellow-Billed Cuckoo. U.S. Fish and Wildlife Techniques and Methods, 45 p.

• Western Yellow-billed Cuckoo
• Coccyzus americanus occidentalis

United States Fish and Wildlife Service. 2001. Endangered and Threatened Wildlife and Plants; 12-Month Finding for a Peition To List the Yellow-Billed Cuckoo (Coccyzus americanus) in the Western Continental United States. Federal Register. 66 (142):38611

• Yellow-billed Cuckoo
• Coccyzus americanus occidentalis