There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
Here is a major study that focused on Leopard predation of Gorillas.
The research was posted by Gato Gordo on Carnivora in 2012. However, that forum is currently archived.
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In the study, there was an attack on an adult Gorilla, as well as a Gorilla toe being found in Leopard scat.
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Here are the study areas, which are in the Central African Republic (CAR). The dates of study include the time when the Leopard scat was found.
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Here is the Gorilla toe that was found in the Leopard dung. You can see that this picture has been posted multiple times on other forums as well as reddt.
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Here is an account of an attack on a Gorilla by a Leopard at daytime. While the Gorillas did fend off the Leopard with a stick, the Gorillas ran from the Leopard and omitted a 'fear odor'.
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They noted that Leopards consumed the toes of other primates in previous studies.
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There was possible predation, but also they were theorizing scavenging.
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They actually theorized that Leopards go for large animals in forests due to absence of mega-carnivores.
They note kills such as a predation attempt young female buffalo in Bai Hokou, an actual young female Buffalo kill, an immature Bongo kill, and an adult Okapi kill in Ituri Forest, DRC.
This is interesting because the theory was proven to be correct in later studies.
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They concluded with man-eating Leopards, including the famous Leopard of Rudraprayag, which claimed the lives of 125 people.
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source: Fay, J. M. R. "Leopard attack on and consumption of gorillas in the Central African Republic." J Hum Evol29 (1955): 93-99.