Espen Bergersen / Aerial shot of four Humpback whales (Megaptera novaeangliae) socialising close to a tourist boat, Troms, Norway, January.

Espen Bergersen / Aerial shot of three Humpback whales (Megaptera novaeangliae) socialising, Troms, Norway, January.

Espen Bergersen / Aerial shot of a pod of Killer whales (Orcinus orca) socialising near the surface, Sommaroy, Troms, Norway, January.

Franco Banfi / Sperm whale (Physeter macrocephalus) pod socialising, Dominica, Caribbean Sea, Atlantic Ocean, January, Vulnerable species.

Franco Banfi / Three Sperm whales (Physeter macrocephalus) socialising under the surface, Dominica, Caribbean Sea, Atlantic Ocean, Vulnerable species.

Ann & Steve Toon / Meerkats (Suricata suricatta) socialising, Kgalagadi Transfrontier Park, Northern Cape, South Africa, January.

Ann & Steve Toon / Meerkats (Suricata suricatta) at den with young socialising, Kgalagadi Transfrontier Park, Northern Cape, South Africa, January.

Frederique Olivier / Two Burchell's zebra (Equus burchellii) resting with their heads on each other's backs, Serengeti NP, Tanzania.

Tony Wu / Tail fluke of Sperm whale (Physeter macrocephalus) as part of socialising group. Mass defecation and shedding of skin is a common part of social activity and makes the water mirky. Sri Lanka, Indian O...

Pal Hermansen / Female artists walking beside strip of Purple tansy (Phacelia tanacetifolia) planted in wheat field. Valer, Ostfold County, Norway. July 2014.

Richard Du Toit / Giraffes (Giraffa camelopardalis) socialising, head to head. Itala Game Reserve, Kwa-Zulu Natal, South Africa.

Tony Wu / Four Sperm whales (Physeter macrocephalus) socialising in water, Caribbean. non-ex