Tuning into the Masters, viewers not only see a lot but they hear a lot, as well. One common sound is the chirping of the birds at Augusta National. But are those birds real? CBS golf analyst Mark ...

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 ...

Birds don't just sing for beauty, their voices carry messages, warnings, and even regional dialects that reveal a hidden world of communication. Bird sounds offer insight into how intelligent and ...