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Images: The Amazing Chimpanzees of Congo's Goualougo Triangle

Mother and child

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(Image credit: Michael Nichols, National Geographic Society. )

A mother and baby chimpanzee relax in a tree in the Goualougo Triangle, an area of lush forest in the Republic of Congo that is now within the protected borders of the country's Nouabalé-Ndoki National Park.

Chimp, unfazed

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(Image credit: Ian Nichols, National Geographic Society.)

Though the 100-square-mile (260-square-kilometer) region is home to forest elephants and western lowland gorillas, it is perhaps best known for its population of "naïve" chimpanzees apes so isolated from human contact that they are known to boldly approach researchers to investigate the foreign visitors.

Boldly lounging

chimpanzees, parks with chimpanzees, parks with gorillas, where chimpanzees live, where gorillas live, national parks in africa, national parks in congo, congo national parks, goualougo triangle, apes in africa, Nouabal

(Image credit: Ian Nichols, National Geographic Society.)

"Rather than flee at the sight of humans, which is typical in areas where the apes have been hunted, the chimpanzees in the Goualougo Triangle would approach us and move closer to get a better look at their bipedal cousins," said Crickette Sanz, a lead ape researcher with the Goualougo Triangle Ape Project, and an assistant professor at Washington University.

Nice tool

chimpanzees, parks with chimpanzees, parks with gorillas, where chimpanzees live, where gorillas live, national parks in africa, national parks in congo, congo national parks, goualougo triangle, apes in africa, Nouabal

(Image credit: Michael Nichols, National Geographic Society. )

Scientists discovered that the chimpanzees also possessed unique tool-using skills. They not only "fished" for termites with long twigs, as other chimpanzees do, sticking thin sticks into termite mounds to retrieve the insects, but also used shorter twigs and branches to poke holes in the mounds first.

Just a li'l guy

parks with chimpanzees, parks with gorillas, where chimpanzees live, where gorillas live, national parks in africa, congo national parks, goualougo triangle, Nouabal

(Image credit: Michael Nichols, National Geographic.)

The chimps face threats from habitat loss, disease, and poaching, but scientists say the new protections for the apes will improve their plight.