XXX 



FIELD COLOR KEY 



2'. Upper parts purplish blue, black 



ring around head and neck ; . HjM.^ . 



wings and tail bright blue, ^^^^P*^' 

 barred with black and marked \ 



with white. Imitates cries of 

 Hawks. 



p. 154. Blue Jay. 



1'. Small ; head not crested. 

 3, Body ivholly blue or blue-black. 



4. Shining blue-black ... p. 48. Purple Martin. 



4'. Ultramarine to cerulean blue and green. 



p. 149. Indigo Bunting. 



3'. Body not wholly blue or blue-black. 



5. Under parts reddish brown. 

 6. Upper parts steel-blue ; tail 



deeply forked ; forehead chest- 

 nut. Often seen skimming low 

 over meadows for insects. 



p. 49. 



Barn Swallow 



6'. Upper parts intense blue ; tail not forked ; forehead 

 blue like back. f . 41. Bluebird. 



5'. Under parts not reddish brown. 



7. Under parts white throughout ; back 



steel-blue. Nests in trees or in bird- \^^ 



boxes. 



p. 194. Tree Swallow. 



7'. Under parts not white throughout ; back grayish 

 blue. 



