However, chest-beating by gorillas is never intended as a threat to their enemies.
In the late 20th century, George Schaller and Dian Fossey first studied mountain gorillas and found that chest-beating is a behavior which has several different functions. It is utilized in diverse situations, such as for self-assertion, to express excitement, curiosity, solicitation to play, and courtship.
■References (Books, papers, Web articles, etc.)
The Mountain Golilla George B. Schaller Univ of Chicago Pr; 1St Edition edition (January 1, 2000)
Gorillas in the Mist Diane Fossey Dr. Mariner Books; 1st Mariner Books Ed edition (October 6, 2000)
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