-378 EEPOET OF XEW JEESEY STATE MUSEUM. 



Nests from Plainfielcl (Miller) to Demarest (Bowdish), and Al- 

 pine (Ehoads), and at Summit (Hann), Lake Hopatcong (Dwight) 

 and High Knob, Sussex county (Chapman), Sussex and Passaic 

 counties generally (Ehoads). 



It has also been seen in June on Mt. Lucas, near Princeton, where 

 it no doubt breeds sparingly, but this is the most southern station 

 (Babson). 



The Chestnut-sided Warbler in migration associates with the 

 various other species that make up the great warbler waves, and ex- 

 hibits no peculiarities in habits or haunts. 



In its summer home it is a bird of open clearings covered with low 

 second growth. 



Its song closely resembles that of the Yellow Warbler and may be 

 represented by the syllables "tsee, tsee, tsee, tsee, — wee tsee." 



660 Dendroica castanea (Wilson). 

 Bay-breasted Warbler. 



Adult male. — Length. 5-6. Wing. 2.80. Above, gray, somewliat tinged with 

 buff and broadly streaked with black, except on the rump ; top of head, chest- 

 nut ; forehead and sides of head, black ; sides of neck, buff ; two broad wing 

 bars, two outer tail feathers with white subterminal spots ; under surface of 

 body, chestnut, except the center of the abdomen and under tail-coverts, which 

 are buffy-white. In autumn yellowish-olive above streaked with black on the 

 head and back ; below, pale buff, white in the middle of abdomen and a strong 

 wash of chestnut on the flanks ; upper and lower eyelids, white. 



Adult female. — Similar to the male, but much smaller, with chestnut area 

 much reduced. 



Young in first autumn. — Similar to autumnal adult, but chestnut on the 

 flanks a mere trace. 



Usually a rather rare transient visitant, hut common in some 

 seasons, and always more plentiful in autumn. Spring, May 10th to 

 20th: autumn, August 20th to October 1st. 



The Bay-breast is always more abundant in autumn, at which time 

 it is very hard to distinguish it from the Black-poll. 



Like most migrant warblers it is rare in the pine barrens. 



