Plots(1)
For some animals, sound is the key to finding a mate and to warn off the competition. Gibbons, dippers and lyrebirds sing some of the most melodious songs in nature to impress the females, whilst bull elk bugle and a strange deep sea fish hums and barks to communicate its intentions. (Sky UK)
Cast
![David Attenborough](http://image.pmgstatic.com/cache/resized/w88h116crop/files/images/creator/photos/163/119/163119095_345655.jpg)
David Attenborough (guide)
UK