BIRDS OF BOULDER COUNTY, COLORADO 199 



Melanerpes erythrocephalus, Red-headed Woodpecker (406) 



Summer resident; common on the Plains and infrequent in the Yellow Pine 

 zone. Arrives, May 18-27 (S records); leaves, August 25 — September 14 (4 

 records); latest date seen October 23, 1904. Eggs have been found from May 

 25 to June 28 (4 records). 



Asyndesmus lewisi, Lewis's Woodpecker (408) 



Permanent resident; common in summer in the Yellow Pine zone; infre- 

 quent as a wintering bird in the orchards and cottonwoods of the Plains. Eggs 

 have been found from May 28 to June 20 (10 records, mostly Gale's). 



Colaptes cafer collaris, Red-shafted Flicker (413) 



Permanent resident; common in summer from the Plains to the Mountain 

 zones, probably breeding nearly to timberline. Common in winter in the Plains 

 and Yellow Pine zones. It is the most abundant woodpecker in the county at 

 all times of the year. Gale's sets of eggs were taken from May 3 to May 30, ap- 

 parently on the Plains and in the Yellow Pine zone. He records one nest taken 

 May 17 of " 11 eggs slightly sat upon, seemingly the joint laying of two females." 

 Birds showing a red nape patch and others with yellow feathers in the wings are 

 occasionally seen — probably hybrids with the eastern Flicker. 



Order MACROCHIRES, Goatsuckers, Swifts, and 

 Hummingbirds 



Suborder Caprimulgi, Goatsuckers, etc. 



Family CAPRIMULGIDAE, The Goatsuckers, etc. 



Phalaenoptilus nuttalli nuttalli, Poor-will (418) 



Summer resident ; common in the Yellow Pine zone. Its note has been heard 

 as early as May 6; and it has been seen as late as September 20. There are no 

 nesting records. Gale, Blanchard and Sprague have also reported it from the 

 county. Kellogg and Widmann both found it at Estes Park. 



Chordeiles virginianus henryi, Western Nighthawk (420a) 



Summer resident; abundant in the Plains and Yellow Pine zones and rather 

 common as high as the spruce forests. Arrives, May 26 — June 2 (6 records); 

 leaves, August 28 — September 26 (5 records) ; a single bird was noted as late as 

 October 15, 1911. Eggs have been found from June 24 to July 22 (5 records). 

 Gale found its nest at 9,500 feet and the writer has seen it in July between 10,000 

 and 10,500 feet. 



