SONGS OF THK TRUF THRUSHKS. 27 
by no possibility be made to conform to the requirements 
of our clumsy scale. They are merely suggestive. 
The form of the song differs materially in the different 
species. The forms characteristic of the four species under 
consideration may be fairly well represented by curved 
lines placed upon the staff so as to indicate the rise and 
fall in pitch, as follows : 
Wood 
Thrush 
In the same grove with the Wood Thrush several pairs 
of Veeries are nesting. Individuals vary greatly in quality 
of voice and in pitch and length of song. One to which I 
listened yesterday had the song in its simplest form. Pos¬ 
sibly he was young and his voice not yet fully developed. 
The successive arpeggios usually drop a little in pitch, but 
his remained the same, like this : 
