APPENDIX 



n. Back with transverse bars of black and white. 



1. Black patch on breast or breast barred like back; belly pale 

 yellow; sides barred black and white. 



Female Williamson's Sapsucker 53 



2. No black patch on gray breast. 



a. Head black and white, scarlet on head of male. 

 a. Middle tail feathers barred black and white. 



Nuttall's Woodpecker 47 



b'. Middle tail feathers solid black. 



Texas Woodpecker 48 



b. Head grayish brown; belly yellow. 



Gila Woodpecker 57 



III. Back streaked or spotted black and whitish, the white some- 

 times tinged with pale yellow. Belly generally pale yellow; head 

 and throat of male carmine red. 



1 . A black patch on breast more or less distinct. 



Red-naped Sapsucker 51 



2. No black patch; head and breast of adult male entirely car- 

 mine. 



Red-breasted Sapsucker 52 



B. Back black, with lustrous tones of greenish or bluish, or dark 

 brownish black. 



I. Rump or upper tail-coverts white. 



1 . Throat-patch scarlet or white. Forehead black. 



Male Williamson's Sapsucker 53 



2. Chin black; a broad throat crescent of white tinged with sul- 

 phur yellow. Forehead white. 



California Woodpecker 55 



II. Rump black like back. 



1. Head white all around. 



White-headed Woodpecker 49 



2. Head with yellow crown in male; sides barred black and 

 white. 



Arctic Three-toed Woodpecker 50 



3. Head and belly deep crimson ; a gray collar on neck. 



Lewis's Woodpecker 56 



4. Head crested with scarlet; size very large. 



Pileated Woodpecker 54 



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