BIRDS OF COLORADO. 85 



Kansas. One was taken by C. E. Aiken, and there are both a 

 male and a female in the Maxwell Collection. In 1895, Pres. 

 Z. X. Snyder saw one near Greeley. 



412. Colaptes auratus. Flicker. 



Migratory; rare. The eastern form only extends west 

 across the plains to the foothills and there is no record of its 

 breeding, though a few may winter. Taken by Capt. Thorne 

 at Fort Ivyons, December 10, 1883, and by Prof. Osburn at 

 Loveland during the fall migration, September 24, 1889. One 

 was taken by the Pacific Railroad surveying parties on the 

 South Platte. 



413. Colaptes cafer. Red-shafted Fucker. 



Summer resident ; abundant. Breeds from the plains to 

 12,000 feet and is almost as common at 11,000 feet as on the 

 plains. An early migrant reaching northern Colorado by the 

 first week in April and in mild winters, like that of 1895-6, 

 remains all winter throughout the plains region. Even in the 

 severest winter a few linger in the State. Eggs are laid from 

 the last of May on the plains to the middle of June in the 

 mountains. Most of the birds leave the mountains early in 

 November, and the State by the first of December. 



418. Phalsnoptilus nuttalli. Poor-will. 



Summer resident ; common. Breeds on the plains and in 

 the mountains to at least 8,000 feet, while it has been noted as 

 high as 10,000 feet in the mountains of southern Colorado. 

 Arrives about the middle of May and the eggs are laid the latter 

 part of June. Remains in the fall until October. 



418a. Phalsnoptilus nuttalli nitidus. Frosted Poor-will. 

 Summer resident; rare. In his original description of this 

 variety, Mr. Brewster says that Colorado birds are true nuttalli^ 

 and this is of course true for the great bulk of the birds all 

 over the State. But in southeastern Colorado nuttalli becomes 

 mixed with nitidus. Of three specimens taken by Capt. Thorne 

 at Fort Lyon, Mr. Brewster marks two as typical nuttalli and 

 the other as not typical and nearest nitidus. The latter speci- 

 men is now in Mr. Brewster's collection. As nitidus comes 

 north regularly to western Kansas, there is no reason why it 

 should not occur in southeastern Colorado. 



420a. Chordeiles virginianus henryi. Western Night- 

 hawk. 

 Summer resident; abundant. Breeds on the plains and 



up to about 11,000 feet; in the fall wanders to 12,000 feet. 



Is rather more common on the plains and lower foothills than 



