Cyril Ruoso / Ringed-tailed lemur (Lemur catta), portrait, sunbathing in early morning with arms outstretched. Anja Community Reserve, Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta), three sitting sunbathing in early morning. Anja Community Reserve, Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta), two juveniles playing on granite rock, on foggy morning. Anja Community 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 / Women and children working on Bean harvest on Anja Community Reserve. Lemurs look for food in this cultivated area of the reserve. Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) group including babies siting on rock with granite mountain in background. Madagascar 2018.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) eating Chinaberry (Melia azedarach) fruit. Granite mountain, Anja Community Reserve, Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) group sitting on rock. Granite mountain, Anja Community Reserve, Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) group sleeping on granite rock spur at night. Anja Community Reserve, Madagascar.

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 / Ringed-tailed lemur (Lemur catta), two females with babies eating young Chinaberry (Melia azedarach) leaves whilst sitting in tree. Granite mountain, Anja Community Reserve, Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) group drinking from puddle in rock. Anja Community Reserve, Madagascar.

Cyril Ruoso / Madagascar ground boa (Acrantophis madagascariensis) swallowing adult Ringed-tailed lemur (Lemur catta). Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) female with baby clambering across steep rockface. Anja Community Reserve, Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta), two juveniles playing, one jumping in air. Anja Community Reserve, Madagascar.

Cyril Ruoso / Ringed-tailed lemur (Lemur catta), two females with babies standing up in tree to eat young Chinaberry (Melia azedarach) leaves. Granite mountain, Anja Community Reserve, Madagascar.

Bernard Castelein / Ring-tailed mongoose (Galidia elegans), Marojejy NP, Madagascar

Bernard Castelein / Ring-tailed mongoose (Galidia elegans) portrait, Marojejy NP, Madagascar

Bernard Castelein / Ring-tailed Mongoose (Galidia elegans), Marojejy NP, Madagascar

Bernard Castelein / Ring-tailed Mongoose (Galidia elegans), Marojejy NP, Madagascar

Pascal Kobeh / Ring-tailed / Golden cardinalfish (Ostorhinchus aureus) male incubating its eggs in its mouth, Sulu sea, Philippines

Robert Valentic / Coastal ring-tailed gecko (Cyrtodactylus tuberculatus) from Black Mountain near Cooktown in far north Queensland, Australia.

SCOTLAND: The Big Picture / White Tailed Eagle (Haliaeetus albicilla) nest viewing hide run by the community trust in partnership with the RSPB. With plastic eagle foot showing bird rings, Mull, Scotland, UK, June.

Konrad Wothe / Ringtailed lemurs (Lemur catta) play fighting, Nahampoana Reserve, South 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

Juergen Freund / Margit Cianelli caring for a Green ringtail possum (Pseudochirops archeri) baby, feeding it milk. Lumholtz Lodge, Atherton Tablelands, Queensland, Australia Model released.

Juergen Freund / Stella Freund with a baby Green ringtail possum (Pseudochirops archeri) in the forest, Lumholtz Lodge, Atherton Tablelands, Queensland Australia. Model released.

Juergen Freund / Stella Freund with a baby Green ringtail possum (Pseudochirops archeri) in the forest, Lumholtz Lodge, Atherton Tablelands, Queensland Australia. Model released.

Juergen Freund / Margit Cianelli bottle feeding a baby Green ringtail possum (Pseudochirops archeri) Atherton Tablelands, Queensland, Australia. Model released.

Juergen Freund / Margit Cianelli bottle feeding a baby Green ringtail possum (Pseudochirops archeri) Atherton Tablelands, Queensland, Australia. Model released.

Juergen Freund / Margit Cianelli bottle feeding a baby Green ringtail possum (Pseudochirops archeri) Atherton Tablelands, Queensland, Australia. Model released.

Juergen Freund / Wildlife carer Margit Cianelli with a Green ringtail possum (Pseudochirops archeri) baby on her shoulder. Atherton Tablelands, Queensland, Australia. Model released.

Juergen Freund / Wildlife carer Margit Cianelli with a Green ringtail possum (Pseudochirops archeri) baby on her head. Atherton Tablelands, Queensland, Australia. Model released.

Juergen Freund / Wildlife carer Margit Cianelli with a Green ringtail possum (Pseudochirops archeri) baby on her head. Atherton Tablelands, Queensland, Australia. Model released.

Lorraine Bennery / Ring-tailed lemur (Lemur catta) walking on sign about nearby sinkhole. Tsimanampetsotsa National Park, Madagascar, Endangered species, endemic.

Lorraine Bennery / Ring-tailed lemur (Lemur catta), mother with two young babies. Anja Community Reserve, Madagascar, Endangered, endemic.

Lorraine Bennery / Ring-tailed lemur (Lemur catta), portrait in tree, Anja Community Reserve, Madagascar, Endangered, endemic.

Luke Massey / South American coatis (Nasua nasua) in their roost nest at Iguassu Falls, Brazil

Luke Massey / South American coatis (Nasua nasua) in their roost nest at Iguassu Falls, Brazil

Magnus Lundgren / Wild Wonders of China / Ocellated waspfish (Apistus carinatus) Shelter Island, Sai Kung archipelago, Hong Kong, China.

Georgette Douwma / Ring-tailed Cardinalfish (Apogon aureus) West Papua, Indonesia.

Linda Pitkin / Ring-tailed cardinalfish (Ostorhinchus aureus), Triton Bay, near Kaimana, West Papua, Indonesia

Ernie Janes / Ring-tailed lemur (Lemur catta) portrait, captive, occurs in Madagascar.

Ernie Janes / Ring-tailed lemur (Lemur catta) portrait, captive, occurs in Madagascar.

Ernie Janes / Ring-tailed lemur (Lemur catta) portrait, captive, occurs in Madagascar.

Konrad Wothe / Ring-tailed mongoose (Galidia elegans) Ranomafana, Madagascar

Nick Hawkins / Leach's storm petrel (Oceanodroma leucorhoa) in a researcher's hand with a new ring on it's leg, Machias Seal Island, Bay of Fundy, New Brunswick, Canada, July, Vulnerable species.

Juergen Freund / Green ringtail possum (Pseudochirops archeri) , Lumholtz Lodge, Atherton Tablelands, Queensland, Australia

Juergen Freund / Green ringtail possum (Pseudochirops archeri) , Lumholtz Lodge, Atherton Tablelands, Queensland, Australia

Juergen Freund / Green ringtail possum (Pseudochirops archeri) , Lumholtz Lodge, Atherton Tablelands, Queensland, Australia

Juergen Freund / Green ringtail possum (Pseudochirops archeri) Lumholtz Lodge, Atherton Tablelands, Queensland, Australia

Juergen Freund / Green ringtail possum (Pseudochirops archeri) Lumholtz Lodge, Atherton Tablelands, Queensland, Australia

Mark MacEwen / Ring-tailed lemur (Lemur catta) running along branch, Berenty Reserve, Madagascar.

Mark MacEwen / Ring-tailed lemur male (Lemur catta) scent marking tree, Berenty Reserve, Madagascar.

Mark MacEwen / Ring-tailed lemur (Lemur catta) in tree, Berenty Reserve, Madagascar.

Mark MacEwen / Ring-tailed lemur (Lemur catta) scent marking tree, Berenty Reserve, Madagascar.

Mark MacEwen / Ring-tailed lemur (Lemur catta) male scent marking tree, Berenty Reserve, Madagascar.

Mark MacEwen / Ring-tailed lemur male (Lemur catta) male scent marking, Berenty Reserve, Madagascar.