Which hyena is known as the laughing hyena?

Answer 1

A hyena is an animal that looks rather like a dog and makes a sound which is similar to a human laugh.

http://dictionary.reverso.net/english-cobuild/hyena

The spotted hyena, Crocuta crocuta, of Africa S of the Sahara, is the largest and boldest species. It is also known as the laughing hyena because of its cry resembles maniacal human laughter.

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The expression laugh like a hyena, which has become proverbial, refers to the animal's characteristic cry.

http://www.encyclopedia.com/doc/1O214-hyena.html

The call of the hyena sounds like very loud laughter, and the hyena is sometimes referred to as a laughing hyena. A person who is laughing in a loud or foolish way is sometimes described as laughing like a hyena.

http://www.learnersdictionary.com/search/hyena

(idiomatic) To laugh hysterically

http://en.wiktionary.org/wiki/laugh_like_a_hyena

"A woman in tonight's audience had a laugh like a hyena and she laughed all the time."

http://www.yourdictionary.com/laugh

Answer 2

Hyenas are name laughing hyenas because if you listen to a tape of a noise they make at night time while hunting for food it will sound like a mean laugh.