The photo was taken at the Virunga National Park in the Democratic Republic of Congo, which is home to a third of the world's population of endangered mountain gorillas.
A photograph of two gorillas posing for a selfie has gone viral.
"I was very surprised to see it... so it's very amusing".
The ranger helped rescue the gorillas as babies and they were apparently copying human behavior in the photo. However, gorillas are comfortable in the wild walking on two feet for short bursts.
According to BBC, which spoke with Virunga's deputy director Innocent Mburanumwe, the gorillas' mothers were both killed in July 2007. At the same time as illegal hunters kill the gorillas and sell them as "bushmeat", their natural habitat has been pushed from all sides by a war that has been raging for close to 20 years.
After the image began gaining widespread attention online, park officials took to Instagram to verify the photo and share more background on the sensational moment. "These gorilla gals are always acting cheeky so this was the ideal shot of their true personalities", Monday's caption says.
Being a ranger is very unsafe work.
Virunga was declared a UNESCO World Heritage Site in 1979 and contains six gorilla families.
The work of the park was the subject of an Academy Award nominated documentary in 2014, as the conservationists faced threats from oil exploration and a violent armed rebellion in the surrounding jungles.
Two gorillas have posed for a relaxed selfie with rangers at Virunga National Park in DR Congo.