HIRUNDINID^E: Swallows 



207 



Southwestern California 

 S.V. Apr. -Sept. Common, 

 in the comparatively few lo- 

 calities where they nest, mostly 

 near the ocean. Nests in col- 

 onies, under bridges, or in niches 

 of sea-shore cliffs. 



Arizona Generally rare. 

 Nesting-localities very few. 



Southern California S.V., 

 (occasional in winter) Apr.- 

 Oct. In migration occurs in 

 extensive flocks. Nests locally, 

 in willow bottoms of lowlands, 

 in an old Woodpecker hole or 

 natural cavity in a tree. 



Arizona Recorded rarely, 

 as a migrant only. 



S.V. Common Tran- 

 sition Zone Among the 

 earliest of spring birds, and a 

 late fall stayer. Nest usually in 

 a hole of some sort, sometimes 

 about buildings, when it be- 

 comes quite familiar. 



Northern 



Swal low 



Southwestern California 

 S.V. Mar. -Sept. Rare and 

 local. Breeds in close colonies 

 in steep earth banks, most often 

 ocean-facing cliffs, into which 

 nesting-holes are dug. 



Arizona Has been recorded 

 rarely. 



