Changing the pressure from the lungs and the tension of the membrane.
Listen:
syrinx1.wav | syrinx3.wav |
syrinx4.wav | syrinx5.wav |
zebra finch | cuckoo | red-winged black bird |
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zf.wav | cuckoo.wav | rwbb.wav |
zfmod.wav | cuckoomod.wav | rwbbmod.wav |