150 LIFE-MISTORIES OF BIRDS 



twitter as one chases another through the thicket." 

 Its song is said to resemble in style that of Car- 

 dincdis Virginianus though finer in tone, and 

 feebler. The song is said to resemble tweedle- 

 tweedle-tweedle, by Wilson. 



Like its near relative just described, this Warbler 

 is exceedingly restless, hopping from twig to twig 

 in continual pursuit of insects, larvae, and berries 

 for food, -It seldom pursues an insect on the 

 wing. Its flight is low, slightly sustained, and exe- 

 cuted with a gliding movement. 



The insects, mostly beetles, which contribute 

 to its nourishment, are chiefly terrestrial in char- 

 acter. We have detected remains of Cratonychus 

 cinereus with larvae, Harpalus coinpar, Casnon-ia 

 pennsylvmtica, Plaiynu's cupripennis, and Scaritcs 

 siibieraneus, besides Formiea sanguinca, F. subter- 

 ranea, earthworms, a species of Tuhis, and various 

 spiders. 



We have never known it to breed within the 

 limits of Philadelphia. Dr. Brewer describes in 

 "North American Birds," a nest that was obtained 

 form Chester Co., Penn. by J. P. Norris, Esq., that 

 had evidently been located in a bed of fallen leaves. 

 Ife basal part was loosely built of dry leaves, upon 

 which was placed a superstructure constituting a 

 coarse lining of plant-stems and long, wiry rootlets. 

 It was a comparatively flat structure, six inches in 

 diameter, and two in height; the cup being only 

 one-half inch in depth. 



Dr. Gerhardt speaking of this nest in northern 



