SONGS OF WARBLERS 21 



that in the first group are included all the terrestrial and sub-terrestrial 

 species, the lowly nature of whose haunts do not meet the require- 

 ments of a singing-perch, and, abandoning for a time their search 

 for insects, they mount to a favoring branch and give themselves 

 wholly to song. As if in reward for their earnestness we find that 

 this group contains all the notable songsters of the family. 



Class I. Warblers Which Sing While Resting. 



Group A. Loud, whistled songs. 



Prothonotary, Swainson's, Olive (?), and Kirtland's Warblers, 

 Pine and Yellow-throated Warblers (sing also while mov- 

 ing), Oven-bird, Northern Water-Thrush, Louisiana Water-Thrush, 

 Kentucky, Connecticut, Mourning, and Macgillivray's Warblers, 

 Northern Yellow-throat and races (sing also while moving), Chat, 

 and probably also Belding's and Rio Grande Yellow-throats. 



Group B. Warblers which have not loud, zvhistled songs. 

 Tennessee, Cape May, Blackburnian, Palm. 



Class II. Warblers Which Sing While Feeding. 



Group A. Songs of the wee-chee or cher-wee type, with a whistled 



quality. 



Yellow, Magnolia, Chestnut-sided, Bay-breasted, Grace's, Palm, 

 Hooded, Canadian and Wilson's Warblers, American Redstart. 



Group B. Warblers whose songs possess pebbly, twittering notes 

 or which suggest a song of the Chipping Sparrow or Junco type. 



Worm-eating, Bachman's, Nashville, Orange-crowned, Tennessee, 

 Virginia's, Myrtle, Audubon's and Palm Warblers. 



Group C. Warblers in whose songs there is a pronounced 

 zee quality. 



Blue-winged, Golden-winged, Parula, Black-throated Blue, Ceru- 

 lean, Golden-cheeked (?), Black-throated Green, Townsend's, Hermit, 

 and Prairie Warblers. 



Group D. Warblers with a thin or wiry song. 

 Black and White, Cape May, Blackpoll, Blackburnian. 



