404 LAND BIRDS 



and a beginning again in another bush. A very interest- 

 ing description of the habits of this species has been 

 given by Mr. Bowles in "The Condor'' for July, 1902. 

 The nesting habits resemble those of the yellow warblers. 



PLUMAGE BLACK OR IRIDESCENT BLACK 



422. BLACK SWIFT. — Cypseloides niger borealis. 

 Family : The Swifts. 



Length: 7.00-7.50. 



Adults : Tail slightly forked ; entire plumage dusky, and grayish on head 

 and neck ; a black patch in front of the eye. 



Young : Similar, but feathers tipped with whitish. 



Geographical Distribution : From the Rocky Mountains west to the Pa- 

 cific, and from British Columbia south to Lower California. 



California Breeding Range: Irregular and local. 



Breeding Season: June 15 to August 1. 



Nest : On inaccessible cliffs ; made of straw, chips, and horsehair ; lined 

 with green leaves and paper. 



Eggs: 5 ; white. 



The exact range of the Black Swift, or Cloud 

 Swift, is not definitely known. It is found 

 breeding in various localities 

 in California, but never 



in places accessible 

 to anything not pro- 

 vided with wings. In * * Vp V 



the Sierra Nevada and the Coast 



„ r /^ it • :» «™,ii.o 422. Black Swift. 



Rano-p of California it occurs 



Iiange Ul ^«"'»"" a "While flytng rwijlly 



through the air." 



