Cyril Ruoso / Long-tailed macaque (Macaca fascicularis) head portrait, Koram island, Khao Sam Roi Yot National Park, Thailand.

Cyril Ruoso / Long-tailed macaque (Macaca fascicularis) grooming, Koram island Khao Sam Roi Yot National Park, Thailand.

Cyril Ruoso / Long-tailed macaques (Macaca fascicularis) two juveniles sitting close together. Koram island, Khao Sam Roi Yot National Park, Thailand.

Cyril Ruoso / Long-tailed macaque (Macaca fascicularis) approaching camera, Koram island, Khao Sam Roi Yot National Park, Thailand.

Cyril Ruoso / Feral Horses (Equus caballus) gathering around waterhole, Namib-Naukluft National Park, Namibia.

Cyril Ruoso / Mute swan (Cygnus olor) feeding underwater, Burgundy, France, March.

Cyril Ruoso / Mute swan (Cygnus olor) feeding underwater, Burgundy, France, March.

Cyril Ruoso / Mute swan (Cygnus olor) feeding underwater, Burgundy, France, November.

Cyril Ruoso / Mute swan (Cygnus olor) feeding along riverbed, viewed underwater, Burgundy, France. November.

Cyril Ruoso / Mute swan (Cygnus olor) feeding along riverbed, viewed underwater, Burgundy, France. November.

Cyril Ruoso / Mute swan (Cygnus olor) feeding along riverbed, viewed underwater, Burgundy, France. November.

Cyril Ruoso / Rabbit (Oryctolagus cuniculus) juvenile Burgundy, France.

Cyril Ruoso / Rabbit (Oryctolagus cuniculus) juvenile running away, Burgundy, France.

Cyril Ruoso / Rabbit (Oryctolagus cuniculus) juvenile, Burgundy, France. May.

Cyril Ruoso / Common frogs (Rana temporaria) and frogspawn in pond, Yonne, Burgundy, France, February. Commended in the Reptiles, Amphibians and Fish Category of the Wildlife Photographer of the Year Awards competi...

Cyril Ruoso / Tropical frog (Hyperolius sp) trying to climb onto leaf, Bateke Plateau NP, Gabon.

Cyril Ruoso / Golden monkey (Rhinopithecus roxellana) male showing canine teeth, Qinling Mountains, China.

Cyril Ruoso / Golden monkey (Rhinopithecus roxellana) juveniles interacting, Qinling Mountains, China.

Cyril Ruoso / Golden monkey (Rhinopithecus roxellana) females sitting close together with baby inbetween, Qinling Mountains, China.

Cyril Ruoso / Golden monkey (Rhinopithecus roxellana) female with young suckling, Qinling Mountains, China.

Cyril Ruoso / Golden monkey (Rhinopithecus roxellana) jumping over a frozen stream, Qinling Mountains, China. Sequence 2 of 7

Cyril Ruoso / Golden monkey (Rhinopithecus roxellana) adult male and female hugging, Qinling Mountains, China.

Cyril Ruoso / Eastern Chimpanzee (Pan troglodytes schweinfurthii) , Frodo the dominant male and hunter, eating a Red River Hog (Potamochoerus porcus) piglet with two females begging, Gombe National Park, Tanzania

Cyril Ruoso / Eastern Chimpanzee (Pan troglodytes schweinfurthii) eating leaves, Gombe National Park, Tanzania

Cyril Ruoso / Black-legged Kittiwake (Rissa tridactyla) female on nest with young, Latrabjarg Cliff, West Fjords, Iceland

Cyril Ruoso / Greylag Goose (Anser anser) gosling, Austria

Cyril Ruoso / Humboldt Penguin (Spheniscus humboldti), Point Coles Nature Reserve, Peru

Cyril Ruoso / Chacraraju Mountain summit at 6112 meters, Cordillera Blanca Mountain Range, Andes, Peru

Cyril Ruoso / Blue-and-black Tanager (Tangara vassorii) at 4500 meters, Cordillera Blanca Mountain Range, Andes, Peru

Cyril Ruoso / Rainforest interior, Peru

Cyril Ruoso / Banana (Musa sp) leaf detail with water drops, Peru

Cyril Ruoso / South American Squirrel Monkey (Saimiri sciureus) portrait, Peru

Cyril Ruoso / Sumatran Orangutan (Pongo abelii) mother and young, Gunung Leuser National Park, Sumatra, Indonesia

Cyril Ruoso / Asian Elephant (Elephas maximus) pair playing, Way Kambas National Park, Sumatra, Indonesia

Cyril Ruoso / Asian Elephant (Elephas maximus), Way Kambas National Park, Sumatra, Indonesia

Cyril Ruoso / Cape Warthog (Phacochoerus aethiopicus) tusks, hunting trophies that get checked in customs in regard to CITES and local law, France

Cyril Ruoso / Verreaux's Sifaka (Propithecus verreauxi) trio huddling, vulnerable, Berenty Private Reserve, 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 / Common Sunflower (Helianthus annuus) field, Bourgogne, France

Cyril Ruoso / Common Sunflower (Helianthus annuus) field, Bourgogne, France

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 / Verreaux's Sifaka (Propithecus verreauxi) jumping across open ground, 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