h 



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'V 



/il n ij 



il/l 



h 



y 



I >itCOIit) 

 f 



VI L 



I'ioi mi 1993 im iioi' ifoi no7 1901 noi /f/0 iin 



FIG. II. CURVES OF (I) RED-BREASTED NUTHATCH, (II) WHITE-BREASTED 

 NUTHATCH, (III) DOWNY WOODPECKER, (IV) BROWN CREEPER (V) WHITE- 

 WINGED CROSSBILL, AND (VI) RED CROSSBILL. 



