The photograph looks staged. It is not. Mathieu Shamavu took a selfie at the orphaned gorilla center in Virunga National Park in eastern Congo in 2019, and two young females stood up on their hind legs behind him and posed, bellies out, one of them with an almost human slouch.

They stand like that because they were raised among people. They copy the posture of the humans who brought them up.

Ndakasi, on the left, was found in 2007 at two months old, clinging to her mother after armed men had gone through the family. Her caretaker, Andre Bauma, got her through the first night by holding her against his bare chest. He looked after her for the next fourteen years.

She passed away in September 2021, aged 14, in his arms. He said it had been a privilege to care for such a loving creature, and that it was her sweet nature and her intelligence that helped him understand the connection between people and great apes