D. PENNSYLVANICA : CHESTNUT-SIDED WARBLER. I4I 



CHESTNUT-SIDED WARBLER. 



DeNDRCECA PENNSYLVANICA (Z.) Bd. 



Chars. Male, adult : Back streaked with black and pale yellow 

 (sometimes ashy or whitish) ; whole crown yellow, bordered with 

 white, then enclosed in black ; sides of head and neck and entire 

 under parts pure white, with a large black mark on the former, 

 and a chain of chestnut streaks along the sides of the body- 

 Wing-bars white or yellowisii, generally fused in one large patch ; 

 tail-feathers blotched with white ; bill blackish ; feet brown. Adult 

 female : Similar, less highly colored, black on head obscure or 

 wanting, chestnut streaks thinner or fewer. Young : Very differ- 

 ent ; entire upper parts clear yellowish-green ; below, entirely pure 

 white, or with slight traces of the chestnut streaks ; no distinct 

 head-markings; wing-bars yellow ; bill light below. Length, 5.00- 

 5.25 ; wing, 2.50 ; tail, 2.00. 



A common summer resident of New England at 

 large, breeding rather more numerously in the Alle- 

 ghanian than in the Cana- 

 dian Fauna ; in southern New 

 England, nevertheless, more 

 abundant during the migra- 

 tions than in summer. It ar- 

 rives the first week in May, 

 and is generally distributed 

 by the middle of that month, 

 in open mixed woods, thick- 

 ets, orchards, and gardens, 

 occurs in September. Being 

 widely diffused during migration, and frequenting cul- 

 tivated grounds more at that season than when retired 

 and settled for the summer, it is more conspicuous a 

 bird in spring and fall than in the breeding months. 



Fig. 34. — Chestnut-sided War- 

 bler. (Natural size.) 



The return movement 

 most active and most 



