Wyoming Birds. 49 



408. Asyndesmus lewisi: Lewis' Woodpecker. 



Common summer resident in northern Wyoming. 



412a. Colaptes auratus luteus: Northern Flicker. 



Rather uncommon summer resident as compared with the 

 following form. All records so far are from the eastern 

 portions of the state. 



413. Colaptes cafer collaris: Red-shafted Flicker. 



Abundant summer resident throughout the state, from the 

 plains region to timber line. 



ORDER XVI. MACROCHIRES. 



CAPRIMULGIDAE (Nighthawks, Whip-poor-wills, etc.).. 



Enormous numbers of flying insects are consumed by Night- 

 hawks and Whip-poor-wills. Like the swallows, these birds catch 

 their food while on the wing. Their wide mouths are kept open 

 and so serve as traps for mosquitoes, gnats, flies, beetles, Mny flies, 

 locusts, etc. Prof. Aughey of Nebraska examined seven stomachs 

 of Nighthawks, which contained altogether three hundred and forty- 

 eight Rocky Mountain locusts. Their principal food is insects 

 which fly at dusk. They are very useful birds. 



References : 



1. Farmers' Bulletin No. 54, pp. 13-14. 



2. Biological Survey Bulletin No. 38, p. 9. 



3. Year Book of the Department of Agriculture, 1904, p. 514. 



4. "Birds in Their Relation to Man," Weed and Dearborn, pp. 



178-180. 



418. Phalaenoptilus nuttalli nuttalli: Poor-will. 



Fairly common summer resident at the lower altitudes 

 throughout the state! 



420a. Chordelles virginianus henryi: Western Nighthawk. 



Most of the records of Nighthawks in the state refer to 

 this form, which is abundant summer resident at almost 

 all altitudes up to 11,000 feet. 



