4.04 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. 
Famity: 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 
ws 
Ny 
\\ae yj 
Hy ply 
YA AAA 
WY 
iy 
Fite 
in places accessible 
to anything not pro- 
vided with wings. In 
the Sierra Nevada and the Coast 
Range of California it occurs 
We (lO 
422, Buack SwIFT. 
“ While flying swiftly 
through the air.” 
