96 AMERICAN MIDLAND NATURALIST 
the summer. As its name indicates, the bird is usually found in 
woods. No other bird’s notes seems to harmonize so well with a 
quiet grove in summer. 
COWBIRD. 
Molothrus ater. 
The few notes of the Cowbird are exceedingly sweet. When 
on the wing, the bird often gives a loud, clear whistle. In spring, 
when at rest, a gurgling note is heard. The gregarious habit 
of this species adds to the effect of the song, for several birds may 
utter their notes in succession. 
YELLOW WARBLER. 
Dendrovca aestiva 
Not a noted singer, but a hearty one, would probably be 
a correct description of this warbler’s musical powers. As if to 
atone for a lack of sweetness and variety, the bird sings its simple 
song allsummer long. You will find it in marshy places in company 
with the Maryland Yellowthroat. 
CHICADEE. 
Penthestes atricapulus. 
The common note of this species is not notably musical. 
It resembles the name of the bird. Besides this note, it has a 
louder whistle, which is heard occasionally. The Chicadee’s song 
is not so agreeable as. that of its cousin, the Tufted Titmouse. 
The latter species is very rarely heard here. 
FIELD SPARROW. 
Spizella pusilla. 
This modest little bird is a constant singer from spring until 
autumn. Not so gifted as the Vesper or Song Sparrows, still its 
notes are very cheery. As simple as its thrill is, the bird manages 
to vary it a little. This is done by pausing, by raising or lowering 
the voice, or by singing slowly or rapidly. 
(To be continued. ) 
NOTE. 
The number of THE AMERICAN MIDLAND NATURALIST that should appear 
in July has been printed earlier than usual to avoid issuing it during the 
vacation period. 
