Some birds sing to attract a mate. Others dance or display colorful feathers. But in the moonlit forests and shrublands of northern Argentina, one bird courts romance by snapping its wrists together, ...

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Listen to the natural sounds of birds in the wild.

The relationship between sounds in words and their meaning is thought to be mostly arbitrary. Some linguists and behavioural ecologists, however, argue that the instinctive vocal responses that humans ...

Part 1. 'I don't do calls' -- Crossing the sound barrier -- Tone and timpre -- Pitch and frequency -- Rhythm and timing -- Part 2. Put it all together and what have you got? -- Simple calls -- Simple ...