A History of North American Birds; Land Birds; Vol. 2 of 3

by Spencer Fullerton Baird; T. M. Brewer; Robert Ridgway

3. Sphyropicus nuchalis. ♂ Wyoming, 10769.

4. Sphyropicus nuchalis. ♀ Wyoming, 10783.

5. Sphyropicus williamsoni. ♀ Cal., 16090.