Cyril Ruoso / Verreaux's Sifaka (Propithecus verreauxi) trio huddling, vulnerable, Berenty Private Reserve, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) eating Opuntia (Opuntia sp) cactus, introduced from South America, it became a very important food subsistance for Lemurs, cattle and even humans, vulnerable, Berenty P...

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) resting on a tree branch, vulnerable, Berenty Private Reserve, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) group huddles for warmth as they sleep, vulnerable, Berenty Private Reserve, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) male warming himself in the sun, vulnerable, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) portrait, vulnerable, Berenty Private Reserve, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) eating a flower, vulnerable, Berenty Private Reserve, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) calling, vulnerable, Berenty Private Reserve, Madagascar

Cyril Ruoso / Verreaux's Sifaka (Propithecus verreauxi) portrait, vulnerable, Berenty Private Reserve, Madagascar

Pete Oxford / Ring-tailed Lemur (Lemur catta) walking across open ground, vulnerable, Berenty Reserve, southern Madagascar

Pete Oxford / Verreaux's Sifaka (Propithecus verreauxi) hopping across open ground, vulnerable, Berenty Reserve, southern Madagascar

Suzi Eszterhas / Ring-tailed Lemur (Lemur catta) young males fighting, Berenty Private Reserve, Madagascar