486 THE BIRDS OF MAINE 



a^. Wing bars yellowish or yellow ; wing under 2.50. Chest- 

 nut-sided Warbler. 

 ??. Sides not streaked with chestnut ; under parts or sides streaked 

 with dark. 

 a\ Crown with yellow patch in center ; yellow patch on rump. 



Myrtle Warbler.| 

 a^. No yellow patch in center of crown. 

 b'. Crown with white central streak, otherwise black. Black 



and White Warbler, (female). 

 b^. Crown without white central streak, 

 c'. Crown pure black. Black-poll Warbler, (male), 

 c^. Crown olive green, streaked with black. Black-poll 

 Warbler, (female). 

 2. Throat yellow, yellowish or orange. 



§. Under parts streaked or spotted with black. 

 ?. Back ashy gray ; a necklace of black or dusky spots across 



throat. Canadian Warbler. 

 v.. Back not ashy gray. 



a'. Back spotted or streaked with black. 



b'. Centre of crown orange or yellowish; throat yellower 



orange, unstreaked. Blackburnian Warbler, 

 b^. Center of crown not orange or yellowish. 



c^ Head bluish gray or ashy and rump yellow. Magnolia 



Warbler. 

 c^. Head not bluish gray or ashy. 



d'. Two whitish or white bars on each wing. Black-poll 



Warbler, (immature), 

 d^. Only one white patch or bar on wing; cap black. 

 Cape May Warbler, (male). 

 a*. Back neither spotted nor streaked with black. 

 W. Crown patch yellow, contrasted to rest of crown. 



Blackburnian Warbler, 

 b^. No yellow crown patch contrasted to rest of crown, 

 c^. Wings without bars, olive colored; 3.00 or more in 



length. Water Thrush. 

 c^ Wings with either one or two white patches or bars, 

 d^ Only one white patch on wing. Cape May Warbler, 



(female and immature), 

 d^. Two white patches or bars on wing. 



e'. Cheeks bright yellow; outer web of outer tail 

 feather white at base ; inner web of outer tail 

 feather entirely white. Black-throated Green 

 Warbler, (immature). 

 e^. Cheeks not bright yellow; outer tail feather 

 white on inner web only and near tip. Pine 

 Warbler. 



