Add Yahoo as a preferred source to see more of our stories on Google. Some sounds are negative and others positive, the experts say (Getty Images) Pigs are noisy creatures, from their contented oinks ...

European researchers are developing a tool to help identify animal emotions through a vocal recognition system. It aims to help people who work with pigs identify whether the animals are in distress.

The Web site Bzzzpeek.com records onomatopoetic animal sounds ("Moo" or "Ribbet") as children from all over the world express them. Interpretations of animal sounds differ from country to country, ...

Guinea pigs are small animals with big opinions, and squeaks are the fastest way they share them. These sounds typically begin early, often within two weeks of birth, and continue throughout the day.

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