"Monkeys as Judges of Art" by Prague-born Austrian artist Gabriel von Max. (1889)

Pikin, a lowland gorilla, had been captured and was going to be sold for bushmeat but was rescued by Ape Action Africa. Jo-Anne took this photograph as the gorilla was being moved from her former enclosure within a safe forest sanctuary in Cameroon to a new and larger one, along with a group of gorilla companions. She was first sedated, but during the transfer to the new enclosure she awoke. Luckily, she was not only very drowsy, but she was also in the arms of her caretaker, Appolinaire Ndohoudou, and so she remained calm for the duration of the bumpy drive.

Deforestation, poaching and diseases like Ebola have dramatically reduced the western lowland gorilla population over the last 25 years. They are now critically endangered – at the current rate, 80 per cent of the population will be lost within three generations. This image shows how it should be, a relaxed gorilla enjoying a snack of African breadfruit in dense jungle.