Jaymi Heimbuch / African Elephant (Loxodonta africana) orphaned calves with keeper, David Sheldrick Wildlife Trust, Nairobi, Kenya

Mark Taylor / Two cute tabby kittens, Stanley and Fosset, 7 weeks, sleeping in a hammock.

Lisa Hoffner / A baby orphan Elephant (Loxodonta africana), named Murka, wounded by a poacher's spear is comforted by the touch of another elephant's trunk from outside its pen. David Sheldrick Wildlife Trust Eleph...

Edwin Giesbers / Whooper Swan (Cygnus cygnus) with its beak tucked under its wing. The Netherlands, June.

Pete Oxford / Close up of Snow Goose (Chen caerulescens) with head tucked into wing, Slimbridge Wildfowl and Wetlands Trust, SW England, UK captive

John Waters / Banded Mongoose (Mungos mungo) group resting together in shade during heat of mid-day, Mweya Lodge, Queen Elizabeth National Park, Uganda, E. Africa

SIMON KING / Young Meerkats huddling together {Suricata suricatta} Tswalu Kalahari Reserve S Africa

Anup Shah / Eastern Chimpanzee (Pan troglodytes schweinfurthii) male young, three years old, playing with mother's hand, Gombe National Park, Tanzania

Anup Shah / Eastern Chimpanzee (Pan troglodytes schweinfurthii) young male, three years old, playing with mother's hand, Gombe National Park, Tanzania

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Fanni' aged 30 years rubbing genitals with female 'Gaia' aged 22 years to comfort her after a disagreement with another chimpanzee. Gombe N...

Anup Shah / Lion-tailed macaque (Macaca silenus) male hugging a distressed juvenile to comfort it. Anamalai Tiger Reserve, Western Ghats, Tamil Nadu, India.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) baby less than 1 month in mother's arms, Tangkoko National Park, Sulawesi, Indonesia.