VIREONED^E: Vireos 



215 



S.V. Apr. -Aug. Lower 

 Sonoran Zone of southern 

 California, and western and 

 southern Arizona. Confined to 

 thickets of stream-bottoms or 

 willow growth of ponds. 



Least Vi'reo 



S.V. Locally distributed, on dry, hot hillsides of southern California 

 and eastern Arizona. Nowhere numerous. In California appears restricted 

 to greasewood areas. 



WOOD WARBLERS. Family Compsothlypidae 



Live in trees, shrubbery, or marsh growth. Insectivorous. Some species 

 expert fly-catchers but mostly foliage workers like the Vireos. 



Southern California Mi- 

 grant Rare. Possibly more 

 numerous than records in- 

 dicate but mistaken for the 

 Black-throated Gray Warbler. 



Block ond White War bier 



S.V. Lower Sonoran Zone 

 of southern and western Ari- 

 zona, and extreme southeastern 

 California. Willow and mes- 

 quite growth of stream-bot- 

 toms. 



Lucy War bier 



