Nick Garbutt / RF - Ring-tailed lemurs (Lemur catta) back lit and sun bathing at first light. Berenty Private Reserve, southern Madagascar. (This image may be licensed either as rights managed or royalty free.)

Nick Garbutt / Female ring-tailed lemurs (Lemur catta) carrying infants (3-4 weeks) on their backs across open ground. Berenty Private Reserve, southern Madagascar.

Ernie Janes / Ring-tailed lemur (Lemur catta) two huddled together for warmth. Captive.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) amongst granite rocks in cave. Lemurs lick minerals from the rocks. Anja Community Reserve, Madagascar.

Klein & Hubert / Ring-tailed lemur (Lemur catta) reaching out to the tail of other lemur, Madagascar

Klein & Hubert / Ring-tailed lemur (Lemur catta) in tree, Madagascar

Suzi Eszterhas / Ring tailed lemur (Lemur catta) mother and very young (1-2 week) baby. Berenty Private Reserve, Madagascar.

Suzi Eszterhas / Ring tailed lemurs (Lemur catta) feeding on Spiny forest tree (Didierea trollii).Berenty Private Reserve, Madagascar

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

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) foraging in sisal field looking for flowers during a poor year without much fruit. Berenty reserve, Madagascar, September.

Bernard Castelein / Ring-tailed lemur (Lemur catta) female carrying two babies. Anjaha Community Conservation Site, near Ambalavao, Madagascar.

Inaki Relanzon / Ring-tailed lemur (Lemur catta) Anja Private Reserve, near Ambalavao, Central Madagascar.

Andy Rouse,Andy Rouse / Ringtail Lemurs (Lemur catta) playing. 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.

Barrie Britton / Ring-tailed Lemur (Lemur catta) mother and baby Berenty, Madagascar. Photograph taken on location for BBC 'Wild Madagascar' Series, September 2009.

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

Nick Garbutt / RF- Young Ring-tailed lemurs (Lemur catta) carried on mother's back, Madagascar. (This image may be licensed either as rights managed or royalty free.)

Nick Garbutt / Young Ring-tailed lemur (Lemur catta) 6-8 weeks, clinging to mother, Berenty Private Reserve, southern Madagascar, November

Nick Garbutt / Young Ring-tailed lemur (Lemur catta) 6-8 weeks, clinging to mother, Berenty Private Reserve, southern Madagascar, November

Nick Garbutt / Three Ring-tailed Lemurs (Lemur catta) sun basking at dawn. Berenty Private Reserve, southern Madagascar. (digitally stitched image)

Nick Garbutt / Ring-tailed Lemur (Lemur catta) sun basking at dawn. Berenty Private Reserve, southern Madagascar.

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.

Anup Shah / Ring-tailed Lemur (Lemur catta) male scent marking. Berenty Private Reserve, Madagascar. Oct 2008.

Anup Shah / Ring-tailed Lemur (Lemur catta) female with infant (less than one month) portrait. Berenty Private Reserve, Madagascar. Oct 2008.

Anup Shah / Ring-tailed Lemur (Lemur catta) female with infant (less than one month) portrait. Berenty Private Reserve, Madagascar. Oct 2008.

Anup Shah / Ring-tailed Lemur (Lemur catta) female with infant (less than one month) riding on her back. Berenty Private Reserve, Madagascar. Oct 2008.

Anup Shah / Ring-tailed Lemur (Lemur catta) 'sunning' in the early morning light to warm themselves. Berenty Private Reserve, Madagascar. Oct 2008.

Anup Shah / Ring-tailed Lemur (Lemur catta) female carrying baby and scent marking. Berenty Private Reserve, Madagascar. Oct 2008.

Anup Shah / Ring-tailed Lemur (Lemur catta) female carrying infant less than one month on her back. Berenty Private Reserve, Madagascar. Oct 2008.

Fiona Rogers / Ring-tailed Lemur (Lemur catta) female carrying baby one her back, sitting and alert. Berenty Private Reserve, Madagascar. Oct 2008.

Fiona Rogers / Ring-tailed Lemur (Lemur catta) male greeting infant. Berenty Private Reserve, Madagascar. Oct 2008.

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

Edwin Giesbers / Ring-tailed lemur (Lemur catta) portrait, Berenty Reserve, Madagascar, Madagascar

Edwin Giesbers / Ring-tailed lemur (Lemur catta) with young, Berenty Reserve, Madagascar

Edwin Giesbers / Ring-tailed lemur (Lemur catta) portrait, Berenty Reserve, Madagascar

Mark Carwardine / Ring-tailed lemur {Lemur catta} baby on mother's back, portrait, Berenty Private Reserve, southern Madagascar

Mark Carwardine / Ring-tailed lemur {Lemur catta} baby on mother's back, portrait, Berenty Private Reserve, southern Madagascar

Inaki Relanzon / Ring-tailed lemur (Lemur catta) group sitting on ground, sunning in morning sun, Berenty private reserve, south Madagascar

Inaki Relanzon / Ring-tailed lemur (Lemur catta) feeding on fruit in tree, Berenty private reserve, south Madagascar

Inaki Relanzon / Ring-tailed lemur (Lemur catta) looking down from large spiney plant, Itampolo, South Madagascar

Jouan & Rius / Ring-tailed Lemur (Lemur catta) eating flower of E {Euphorbia sp}, dry forest of Berenty reserve, South Madagascar

Jouan & Rius / Hand of Ring-tailed Lemur (Lemur catta), dry forest of Berenty reserve, South Madagascar

Rod Williams / Ring-tailed lemur {Lemur catta} infant on adults back. Captive. Madagascar. Lemurs

Nick Garbutt / RF- Ring tailed lemur carrying young (Lemur catta). Madagascar. (This image may be licensed either as rights managed or royalty free.)

John Waters / Ring-tailed lemur in tree {Lemur catta} Madagascar