Swifts 



422. Black Swift {Cypselaiaji. fd^er horeaiis) . L. 7; 

 W,6.5. Taii Without spmes, slightly forked, /ids. 

 Sooty black, paler belbw; a black spot before the eye; 

 forehead whitish. Notes. Generally silent. (Ben- 

 dire.) 



Range.— Breeds from Central America north. In mountains of 

 western United btates. to British Columbia; east to Colorado: winters 

 soutli of United States: more common In Pacific coa^t states. 



423, Chimney Swiff (Cht»turu pt^lapca). L. 5.4; 

 W. 4.Q. Tail with protruding spines. Ads. Above 

 sooty, rump and underparts paler; throat whitish. 

 Notts. A rolling twitter. 



Range. — Eastern North America, west to tiie Plains; breeds from 

 Flurlda lu Labrador and Manitoba; winters suutii of United States, to 

 Ceiitml Auieilc^. 



424. Vaux Swift CCh^tiira vattxii)- L. 4.5; W. 4.4. 

 Ads. Similar to No. 423, but smaller and somewhat 

 browner. Notes. Resemble those of No. 423, but are 

 less frequently uttered. (Bendire.) 



Range. — Western United States; breeds on Pacific coast, locally, 

 nctrtli lo Br3Ii:.h Columbia; 'ea^t casually to Montana and Arizona^ 

 winters south of United States to Central America. 



425. White-ttlPOated Swif( (AeronauUs wdanolea- 

 Cits'). L. 6.5. Tail forked, without spines. Ads. 

 Above sooty brownish black; breast, middle of belly 

 and flank patches white. Notes. A sharp, metallic 

 twitter. 



Ranee. — Western United States; east to western Nebraska and 

 BlaciiHIlls; breeds in Rocky Mountains north to Montana; on Pa- 

 cific coast north to Lat. 38° ; winters south of United Slates to Cen- 

 tral America. 



158 



