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

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

3. Antrostomus nuttalli. ♂ Wyoming, 38324.

4. Chordeiles henryi. ♂ Wyoming, 38323.

5. Chordeiles texensis. ♂ Texas, 42189.

6. Centronyx ochrocephalus. Colorado.