CLOSED MOUTH VOCALISATION IN BIRDS

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=_6ZE4c1WPdA

How do birds sing or call with a closed beak? In this video I show many doves and some pigeons and a tinkerbird that sing with closed beaks. Can you think of...

video, sharing, camera phone, video phone, free, upload
#############################