WARBI.HK SONGS. ho 



f. Forehead yellow ; a black line in front of eve. 



Blne-winj^ed Warbler. 

 ^. Forehead yellow ; crown l)lack. 



r. Duller colored. Wilson '.s Warbler. 



2. Brighter colored. (Western). Pileolated Warbler, 



h. Head bluish ; breast with a chestnut patch. 



1. Underparts yellower; less black on side of head. 



I'arula Warbler. 



2. Underparts duller ; side of head blacker. 



Northern Parula Warbler. 



3. Same as I and 2. ( Extreme .south-we.st ). Sennett's Warbler, 

 i. Head ash-L^ray; line over eye yellow. ( South-we.st). 



Grace's Warbler. 

 j. Top of head with black stripes. 



1. Lores chestnut. (South-west I. Brasher's Warbler. 



2. Lores black. (South-west). Bell's Warbler. 

 HL Throat white or whitish. 



a. Crown with two blackish stripes. Worm eating Warbler. 



b. Crown plain brown. Swainson's Warbler. 



c. Crown bluish-ash ; Ijack olive green. Tennes.see Warbler. 

 (1. Crown with a partially concealed patch of rufous brown ; 



back dull olive-green ; underparts pale vellow. 



Orange-crowned Warbler. 

 ee. Above bright olive-green ; brighter underneath. 



(Western). Lutescent Warbler. 



Another western form, not very different, is Duskv Warbler. 



IV. Throat White or Whitish; Under-parts 

 Streaked or Spotted. 



A. A patch of yellow on the side of the breast. 



1. Crown and rump with a yellow spot. Myrtle Warbler. 

 There is no field character to distinguish the western 



form. The wing and tail are longer. Hoover's Warbler. 



2. Yellow band on middle of wing and tail. Innnature of Redstart. 



B. No yellow patch on side of breast. 



1 . With con.spicuous wing bars. 



a. Back bright bluish. Cerulean Warbler. 



b. Back grayish ; crown black. Black-poll Warbler. 



c. Back greenish yellow ; sides chestnut. Chestnut-sided Warbler. 



2. Without wing-bars. Walking Warblers. 



a. Middle of crown with a rufous streak. Oven-bird. 



b. Crown plain ; line over eye buff. Water-Thrush. 

 The form from Illinois westward is larger. 



Grinnell's Water-Thrush. 



c. Crown plain ; line over white eye. Louisiana Water-Thrush. 

 ■\. Hvervwhere streaked black and white. Black and White Warbler. 



