Cyril Ruoso / Ring-tailed Lemur (Lemur catta) basking, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) basking, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) trio basking, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta), Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) in tree, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother with young drinking, Anja Park, Madagascar

Chien Lee / Ring-tailed Lemur (Lemur catta) mother carrying young, Berenty Private Reserve, Madagascar

Chien Lee / Ring-tailed Lemur (Lemur catta) mother carrying young, Berenty Private Reserve, Madagascar

Suzi Eszterhas / Ring tailed lemur (Lemur catta) mothers with two-week babies. Berenty Private Reserve, Madagascar

Suzi Eszterhas / Ring-tailed Lemur (Lemur catta) mother drinking with baby on back, Berenty Private Reserve, Madagascar

Suzi Eszterhas / Ring-tailed Lemur (Lemur catta) mother and week-old twins, Berenty Private Reserve, Madagascar

Bernard Castelein / Ring-tailed Lemur (Lemur catta) Anjaha community conservation site, Ambalavao, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother with baby clinging to her back, 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) baby riding on mother's back, vulnerable, Berenty Private Reserve, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) troop walking down dirt road, 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 / Ring-tailed Lemur (Lemur catta) two adults and a baby, vulnerable, Berenty Private Reserve, Madagascar

Andy Rouse,Andy Rouse / Ring tailed Lemur (Lemur catta) silhouetted. Madagascar.

Andy Rouse,Andy Rouse / Ring tailed Lemurs (Lemur catta) silhouetted, Madagascar.

Andy Rouse,Andy Rouse / Ring tailed Lemur (Lemur catta) mother carrying baby on back. Madagascar.

Jasper Doest / Ring-tailed Lemur (Lemur catta) mother with young, Netherlands

Fiona Rogers / Ring-tailed Lemur (Lemur catta) infant (less than 1 month) chasing tail of adult lemur. Berenty Private Reserve, Madagascar. Oct 2008.

Anup Shah / Ring-tailed Lemur (Lemur catta) male wrist-marking the tail, lip lared and ears back, during territorial confrontation. Berenty Private Reserve, Madagascar. Oct 2008.

Kevin Schafer / Ring-tailed Lemur (Lemur catta) in Octopus tree, Mantady National Park, Madagascar

Thomas Marent / Black Lemur (Lemur macaco) male, Lokobe Nature Special Reserve, Madagascar

Pete Oxford / Ring-tailed Lemur (Lemur catta) walking across rocks in the Andringitra Mountains, vulnerable, south central Madagascar

Pete Oxford / Ring-tailed Lemur (Lemur catta) portrait on rocks in the Andringitra Mountains, vulnerable, south central Madagascar

Pete Oxford / Crowned Lemur (Eulemur coronatus) male on 'tsingy', vulnerable, Ankarana Special Reserve, northern Madagascar

Pete Oxford / Ring-tailed Lemur (Lemur catta) portrait on rocks overlooking the Andringitra Mountains, vulnerable, south central Madagascar

Pete Oxford / Ring-tailed Lemur (Lemur catta) portrait on rocks in the Andringitra Mountains, vulnerable, south central Madagascar

Pete Oxford / Ring-tailed Lemur (Lemur catta) mother and young, vulnerable, near Andringitra Mountains, south central Madagascar

Pete Oxford / Ring-tailed Lemur (Lemur catta) mother and young, vulnerable, near Andringitra Mountains, south central Madagascar

Pete Oxford / Ring-tailed Lemur (Lemur catta) portrait, vulnerable, overlooking the Andringitra Mountains, south central Madagascar

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

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

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

Pete Oxford / Aye-aye (Daubentonia madagascariensis) one of the more bizarre mammals in the world, their peculiar features include huge ears, bushy tail, long shaggy coast, rodent-like teeth and a skeletal 'probe-l...

Pete Oxford / Coquerel's Sifaka (Propithecus coquereli) mother and baby, Ankarafantsika Strict Nature Reserve, western Deciduous forest, Madagascar

Pete Oxford / Coquerel's Sifaka (Propithecus coquereli) in western deciduous forest, Ankarafantsika Strict Nature Reserve, Madagascar

Pete Oxford / Diademed Sifaka (Propithecus diadema), Mantadia National Park, Madagascar

Nick Garbutt / Adult Eastern ring tailed Mongoose {Galidia elegans elegans} portrait on fallen log, Marojejy National Park, Madagascar.

Gerry Ellis / Ring-tailed Lemur (Lemur catta) portrait, Madagascar

Konrad Wothe / Brown Mouse Lemur (Microcebus rufus), Madagascar

Gerry Ellis / Ring-tailed Lemur (Lemur catta) group, Washington Park Zoo, Portland, Oregon, endemic to Madagascar

Gerry Ellis / Ring-tailed Lemur (Lemur catta) sitting on tree branch, Madagascar

Cyril Ruoso / Ringed-tailed lemur (Lemur catta), two sitting on branch. Berenty Reserve, Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) sitting on branch. Berenty Reserve, Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) sunbathing on rock in early morning, granite mountain in background. Anja Community Reserve, Madagascar. 2018.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta), three adults with babies, from behind with tails visible. Anja Community Reserve, Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta), two sitting and snuggling on branch. Granite mountain, Anja Community Reserve, Madagascar.

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) trio with tourists, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) group huddling for warmth, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) group huddling, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta), Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta), Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) in tree, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) in tree, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) pair in tree, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta), Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta), Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) group basking, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) feeding on tomato, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta), Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother carrying young, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) young playing, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) in tree, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) in tree, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta), Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) jumping, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta), Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother and young, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother and young, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) male scenting tail to use during stink fights with other males, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother with young climbing onto tree, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) group drinking from puddle, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) in forest, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother and young in forest, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother and young, Anja Park, Madagascar

Cyril Ruoso / Malagasy Ground Boa (Acrantophis madagascariensis) swallowing Ring-tailed Lemur (Lemur catta) prey, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) group huddling, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) feeding on fruit, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother with young drinking, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother and young, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) pair basking, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) basking, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) mother with young feeding on fruit in tree, Anja Park, Madagascar

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) in tree, Anja Park, Madagascar

Dave Bevan / Male Common pheasant (Phasianus colchicus) fanning tail, displaying to another male to indicate dominance, Suffolk, England, UK, December.