106 LIFE-HISTORIES OF BIRDS 



In habits there is a closer resemblance to the 

 Muscicapidce than to the Paridce. Along the 

 trunks and branches of trees it moves, and freely 

 suspends itself therefrom with comparative ease, 

 but with less gracefulness and dexterity than is 

 noticeable in Dendrceca castanea. In the capture 

 of insects it particularly excels. The .peculiar 

 clicking noise which is heard after a racy tidbit has 

 been engulphed, is characteristic of the Fly- 

 catchers. 



Its flight is moderately elevated, gracefully un- 

 dulating, and but poorly sustained. 



The soncr of this Warbler which we have fre- 



o 



quently heard and carefully studied, may be fitly 

 expressed in language by ise-ah, tse-ah, tse pro- 

 nounced loud and quick; the last syllable ending 

 very abruptly. Whilst feeding it will occasionally 

 stop, peer around, utter a low, simple twlch, and 

 resume operations. 



Traces of Cratonychus cinereus, C. pertinax, 

 Haltica chalybea, Cymindis viridipennis, Chryso- 

 mela formos a, Formica sanguinea, small spiders 

 and various aphides have been found among the 

 undigested contents of several stomachs. Like 

 many others of its family-relations, the ripened 

 anthers and immature ovaries of apple and cherry 

 blossoms it considers a great luxury. 



This species is not known to breed in Pennsyl- 

 vania. Several pairs were observed by Mr. Nutt- 

 all among the Alleghanies near Farranville, Pa., 

 under rather suspicious circumstances. Further 



