Cooperative Fish and Wildlife Research Units Program: Idaho
Education, Research and Technical Assistance for Managing Our Natural Resources

Gyug, L.W., R. C. Dobbs, T. E. Martin, and C. J. Conway. 2012. Williamson's Sapsucker (Sphyrapicus thyroideus), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: doi:10.2173/bna.285