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. 



PLUJVEAGE BLACK OK lErDESCEBTT BI.ACK 



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. 



Oalifornia Breeding Range : Irregular and local. 



Breeding Season : June 16 to August 1 . 



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

 with green leaves and paper. 



Eggs: 6 ; 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 nc\ er 



X C C 



in places accessible -"=««—- > - -=i™«- 



to anything not pro- 

 vided with wings. In 

 the Sierra Nevada and the Coast 

 Range of California it occurs t'lJ'tT ^^Z' 



■^•"*"& *• wkile flying swiftly 



through Ike air," 



