The Secret Lives of Cross River Gorillas: A Journey to Uncover the Hidden Truth We weren’t able to create a summary for you. Refresh your page to try again. The Cross River gorilla is the most western and northern form of gorilla, and is restricted to the forested hills and mountains of the Cameroon-Nigeria border region at the headwaters of the Cross River . The Cross River gorilla is the most western and northern form of gorilla, and is restricted to the forested hills and mountains of the Cameroon-Nigeria border region at the headwaters of the Cross River . Fewer than 300 cross river gorillas remain in the wild making them the world’s rarest great ape. Cross River gorillas were thought to be extinct following the 1960s civil war in Nigeria. Fewer than 300 cross river gorillas remain in the wild making them the world’s rarest great ape. Cross River gorillas were thought to be extinct following the 1960s civil war in Nigeria. The CrossRivergorilla (Gorillagorilla diehli) is a critically endangered subspecies of the western gorilla (Gorillagorilla). It was named a new species in 1904 by Paul Matschie, a mammalian taxonomist working at the Humboldt University Zoological Museum in Berlin, but its... CrossRivergorillas typically live in unprotected forest and so face the ongoing threat of habitat loss through logging for agriculture. In addition, demand for bushmeat continues to put pressure on wild populations. Discover CrossRivergorillas, the rarest gorilla subspecies. Learn about their habitat, population, diet, behavior in Nigeria and Cameroon. CrossRivergorillaslive in small family groups of approximately four to seven individuals.