FIELD COLOR KEY xli 



16'. Size small ; breast with necklace of black spots ; 

 upper parts gray, 



p. 322. Canadian Warbler. 



6'. Under parts not mainly yellow or orange. 

 17. Top of head red. 



18. Back uniformly barred with black and white; 

 under pai-ts whitish, washed with red. 



p. 211. Red-bellied Woodpecker. 



18'. Back divided into black and white areas ; whole, 

 head and throat red ; belly white. 



p. 131. Red-headed Woodpecker. 



17'. Top of head not red. 



19. Breast and belly chestnut ; whole head, throat, and 

 most of back black . . p. 61. Orchard Oriole. 



19'. Breast and belly not chestnut ; whole head not 

 black. 

 20; Front of head and throat white ; back of head and 

 neck blackish ; rest of body mainly grayish ; plu- 

 mage soft and fluffy. Northern birds. 



p. 217. Canada Jay. 



20'. Front of head and throat not white ; back of head 

 and neck not blackish. 

 21. Upper parts blue. 



22. Head crested ; throat gray with black collar. 



p. 151. Blue Jay. 



22'. Head not crested ; throat and sides black. 



p. 312. Black-throated Blue Warbler. 



21'. Upper parts not blue. 



23. Throat white, sides of breast and rump yellow ; 

 breast black. 



p. 310. Yellow-rumped Warbler. 



