6. SHARPLY DEFINED BLACK AND WHITE MARKINGS. 



Black crown and throat; gray back; 5 in, CHICKADEE. 



Black and white streaked bird ; black crown ; 5 in. BLACK POLL WARBLEK. 



Black and white streaked bird; striped crown BLACK AND WHITE WAEBLER. 



Slate head, breast and back; white below and outer tail feathers JUNCO. 



White throat; gray breast; crown striped black and white WHITE-THROATED 

 SPARROW. 



Large white crown patch edged with black; light below WHITE-CROWNED 

 SPARROW. 



Black body ; yellowish nape ; white rump and on wings BOBOLINK. 



Black crown; gray back; climbs down trees WHITE-BREASTED NUTHATCH. 



Dull gray birds with no markings may be FLYCATCHERS. 



Dull brownish, streaked birds are probably species of SPARROWS. 



Plain greenish backs and dull white underparts denote VIREOS. 



Glossy blackbirds are GRACKLES or CROWS; if with red shoulders. RED- 

 WINGED BLACKBIRD ; with dull brown head, COWBIRD. 



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