34 FIELD KEY. 



ally sallying forth from its exposed perch in pur- 

 suit of a passing Crow; note, an unmusical, steely 

 chatter KINGBIRD, page in. 



b. Length 6.90 inches; upper parts washed with rusty; 

 generally seen in flocks; terrestrial. 



SNOWFLAKE, page 180. 



2. No white in the plumage. 



A. Length 19.00 inches; jet black. 



AM. CROW, page 106. 



B. Length 12.00 inches; black with metallic reflec- 

 tions; iris yellowish; migrates in flocks; nests usu- 

 ally in colonies in coniferous trees; voice cracked and 

 reedy; tail "keeled" in short flights; a walker. 



PURPLE GRACKLE, page 105. 



C. Length 9.50 inches; shoulders red; haunts marshes; 

 call, kong-quer-ree. 



RED-WINGED BLACKBIRD, page 100. 



D. Length 7.90 inches; head and neck coffee-brown; 

 frequently seen on the ground near cattle. 



COWBIRD, page 98. 



V. Birds not included in the preceding sections (that 

 is, plumage without either yellow, orange, red, or 

 blue; not conspicuously black, or black and white). 



i. Under parts white or whitish, all one color, without 

 streaks or spots. 



A. Back without streaks or spots. 



a. Back olive-green; gleaners, exploring the foliage 

 for food or flitting about the outer branches. 

 a 1 . Length 6.25 inches; a white line over the eye 

 bordered by a narrow black one; cap gray; iris 



