246 KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 
Crown, brown, like back; throat and underparts, pale brown; whitish on 
belly; breast, usually with indistinct streaks; back, brown, without streaks. 
Indigo Bird. 
Indigo Bunting. 
Passerina cyanea ( female). 
See No. 446. 
Crown, black, with white stripe in centre; stripe over eye, white; usually 
more or less yellow in front of eye; throat, white; breast, grayish; carpal 
joint (bend of wing), pale yellow ; back, streaked. 
White-throated Sparrow. 
Lonotrichia albicollis. 
See No. 423. 
Crown, black, with white stripe in centre; no distinct white patch on throat; 
carpal joint (bend of wing), not yellow; back, streaked. 
White-crowned Sparrow 
Zonotrichia leucophrys- 
See No. 422. 
Crown, brown, with grayish brown centre; nape, gray; bill, reddish brown ; 
back, streaked; wing coverts, tipped with white. 
White-crowned Sparrow. 
Zonotrichia leucophrys (immature: 
See No. 422. 
Crown, light chestnut brown (streaked with black in young birds); rump, 
slaty gray; bill, black; back, streaked. Young birds in fall have the bill 
brownish. 
Chipping Sparrow 
Spizella socialis. 
See No. 425. 
Crown, rufous brown; rump, pale olive brown; upper mandible, black ; 
under mandible, pale, with dark tip; back, streaked. 
Tree Sparrow. 
Spizella monticola. 
See No, 424. 
