HOST RELATIONS OF PARASITIC COWBIRDS 



41 



seaside sparrow: once (only record of 



parasitism) 

 vesper sparrow: several times 

 lark sparrow: twice (out of about 30 



records of parasitism) 

 white-winged junco: twice (out of 2 



records of parasitism) 

 slate-colored junce: several times 

 Oregon junco: once (out of 2 records 



of parasitism) 



chipping sparrow: frequently 

 clay-colored sparrow: frequently 

 Brewer's sparrow: twice (out of 3 



records of parasitism) 

 field sparrow: several times 

 white-throated sparrow: several times 

 fox sparrow: at least once (out of a 



few records of parasitism) 

 swamp sparrow: several times 

 song sparrow: frequently 



Hosts of the Brown-headed Gowbird 

 Summary 



