Cyril Ruoso / Chimpanzee (Pan troglodytes) adult female with orphan baby she has adopted, Gabon

Mark Taylor / Tabby kittens, Stanley and Fosset, 3 months old, sitting and snuggling together.

Mitsuaki Iwago / Giant Panda (Ailuropoda melanoleuca), three captive bred cubs, China

Ingo Arndt / European River Otter (Lutra lutra) sisters resting, Europe

Ingo Arndt / European River Otter (Lutra lutra) sisters resting, Europe

Matthias Breiter / Polar Bear (Ursus maritimus) female with twelve week old cub, Canada

Matthias Breiter / Polar Bear (Ursus maritimus) mother with cub, Churchill, Manitoba, Canada

Michio Hoshino / Polar Bear (Ursus maritimus) cub nuzzling mother, Churchill, Manitoba, Canada

Ingo Arndt / Puma (Puma concolor) female and two cubs snuggling on hillside. Torres del Paine, Patagonia, Chile. July 2017.

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

Karine Aigner / Grey langur / Hanuman langur (Semnopithecus sp) baby snuggling up to its mother. Ranthambore National Park, Rajasthan, India.

Ingo Arndt / Mountain Lion (Puma concolor) mother and cubs, Torres del Paine National Park, Patagonia, Chile