Inaki Relanzon / Black and white ruffed lemur (Varecia variegata variegata) portrait, Captive, Madagascar, Critically endangered

Edwin Giesbers / Portrait of Red ruffed lemur (Varecia variegata ruber) Captive, Netherlands.

Edwin Giesbers / Black and white ruffed lemur (Varecia variegata variegata) hanging from branch, Madagascar, captive

Edwin Giesbers / Black and white ruffed lemur (Varecia variegata variegata) portrait, captive, Madagascar

Thomas Marent / Red Ruffed Lemur (Varecia rubra) portrait, Masoala National Park, Madagascar

Jouan & Rius / Black and white ruffed lemur (Varecia variegata variegata) portrait, tropical rainforest, Andasibe-Mantadia NP, Madagascar

Pete Oxford / Black and White Ruffed Lemur (Varecia variegata variegata) in rainforest near Mantadia National Park, endangered, Madagascar

Nick Garbutt / Red ruffed lemur (Varecia rubra), female climbing in lowland rainforest understorey. Masoala National Park, north east Madagascar.

Nick Garbutt / Red ruffed lemur (Varecia rubra) female in understorey of lowland rainforest. Masoala National Park, north-east Madagascar.

Nick Garbutt / Adult Red Ruffed Lemur (Varecia rubra) resting in rainforest canopy. Masoala National Park, north east Madagascar. Endangered.

Chien Lee / Black And White Ruffed Lemur (Varecia variegata variegata) hanging from branch, Andasibe, Madagascar

Suzi Eszterhas / Black And White Ruffed Lemur (Varecia variegata variegata), Madagascar