the vocal cords of the human
larynx. Instead, the air is forced
through the tubes and sound is
created by the walls of the syrinx
vibrating. The muscles then
change the tension in the syrinx
to modify and tune the sound.
Some species, especially the
passerines, can make sounds
from either or both of the y-
shaped vocal passages at once,
creating otherworldly two-tone
Calls, Songs, & Sounds Page 8 of 25
Comments