BLACK-THROATED BLUE WARBLER. 
tate that, of course, by simultaneously humming and 
whistling through the teeth. The range of voice is evi- 
dently comprehended by a fifth interval, and commonly 
by afourth. There are three, four, and sometimes five 
ascending notes to the song (commonly four), but these 
are so closely run together—i. e., slurred, that their in- 
dividuality is lost; by lines, the song should appear 
thus: 
SS Se 
=e S 
wea 
In musical notation it should appear thus: 
And that covers the ground, so far as type is concerned. 
I have another common form which shows that the bird 
is capable of variation both as to length of note and 
expression: 
Also Mr. Lynes Jones makes mention of several render- 
ings which suggest some difference with the foregoing 
notations, one is chweu-chweu-chweu with each syllable 
uniform, and another is we-we-2-2-2-2-2-2 with a harsh 
and penetrating accent. But I question whether such 
variations would cause any trouble in the identification 
of the song; all writers seem to agree that it begins 
pianissimo and ends with a shrill fortissimo, and it only 
remains for me to add that it is completely off the 
keyboard of the piano, notwithstanding its low-pitched 
overtone. 
The Black-throated Blue is essentially a woodland bird, 
but he frequently visits the roadside and the vicinity of 
dwellings. He is also a fearless little fellow, compara: 
tively speaking, not altogether free from consuming 
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