412 The Bird 
low, beneath the wing-tips, while active, nervous species 
carry it more or less raised. 
In certain of the flycatchers 
the tail, which hangs demurely 
downward, reacts with a jerk 
to every note of the bird, as if 
connected with the bird’s vo- 
cal apparatus, as in our com- 
mon Least Flycatcher at every 
“Che-bec’!”” 
The jerking motion of the 
tail seems to have become 
a regular habit with many birds, and, curiously enough, 
Fic. 327,—Tail of Chimney Swift. 
Fic. 328.—Tail of Flicker. 
especially with those which spend their lives chiefly along 
