WESTERN PALM WARBLER 111 



ground. Its song resembles that of the Chipping Sparrow, 

 but is less strong even than that simple performance. It is 

 often associated in migration with the Yellow-rumped War- 

 bler ; the songs of the two Warblers are both rather feeble, 

 but the Yellow Redpoll's is rougher and less likely to rise 

 or fall into a different key. 



The Yellow Palm Warbler has in spring a chestnut 

 crown, like that of a Chipping Sparrow, but its bright yel- 

 low under parts distinguish it, of course, from that bird. 

 It has, moreover, a trick of constantly wagging its tail up 

 and down ; this habit distinguishes it readily from the two 

 other warblers with yellow under parts, the Nashville and 

 the Yellow Warbler. (See also the account of the Black- 

 poll Warbler in autumn, p. 116.) 



Palm Warbler. Dendroica palmarum 

 5.25 



The Western Palm Warbler is a regular, though rare, mi- 

 grant in the latter half of September, generally appearing 

 earlier than the preceding species. Its habits and haunts 

 are similar to those of the Yellow Palm Warbler, and it 

 takes a trained eye to distinguish between the two. Its 

 breast, throat, and upper belly are all dingy whitish, only 

 the extreme lower belly and the feathers under the tail are 

 bright yellow. The eastern bird is yellow over the entire 

 under parts. 



Pine Warbler. Dendroica vigorsii 



5.52 



Ad. $. — Upper parts with a- strong greenish-yellow tinge in 

 a good light; wing-bars whitish; throat and breast yellow, brightest 

 on the throat; belly paler. Ad. 9- — Upper parts brownish with 

 fainter greenish-yellow tinge; under parts grayish-white with a 

 faint tinge of yellowish on the breast; wing-bars narrower, gray- 

 ish. Im. — Similar to £>> but without any yellowish tinge; wing- 

 bars very faint. 



