Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) females socializing, Punta Espinosa, Fernandina Island, Galapagos Islands, Ecuador

Flip Nicklin / Sperm Whale (Physeter macrocephalus) group socializing underwater, Dominica

Thomas Marent / Silvery Marmoset (Callithrix argentata) pair grooming, native to Brazil

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) family socializing, Parc National des Volcans, Rwanda

Mike Potts / Three Puffins (Fratercula arctica) socializing on a rock ledge, Puffin Island, Anglesey, North Wales, UK

Mike Potts / Four Puffins (Fratercula arctica) socializing on a rock, Puffin Island, Anglesey, North Wales, UK

Doug Perrine / Hawaiian / Pantropical / Long snouted / Gray's spinner dolphins (Stenella longirostris longirostris) pair courtship / socializing, Kaupulehu, Kona Coast, Big Island, Hawaii (Central Pacific Ocean)

Suzi Eszterhas / Killer whale {Orcinus orca} two socializing whales swim belly to belly beneath the surface, Prince William Sound, Alaska, USA

Tui De Roy / Chatham Albatross (Thalassarche eremita) pair on a cliff edge, critically endangered, The Pyramid, Chatham Islands

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) juvenile bulls greeting, Santa Fe Island, Galapagos Islands, Ecuador

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) females socializing, Punta Espinosa, Fernandina Island, Galapagos Islands, Ecuador

Tui De Roy / Salvin's Albatross (Thalassarche salvini) small group of non-breeders socializing in open areas of crowded nesting colony, Proclamation Island, Bounty Islands, New Zealand

Tui De Roy / Common Marmoset (Callithrix jacchus) mutual grooming between social group members, Atlantic Forest, Brazil

Tui De Roy / Golden Lion Tamarin (Leontopithecus rosalia) family group socializing, Poco Das Antas Reserve, Atlantic Forest, Brazil

Tui De Roy / Golden Lion Tamarin (Leontopithecus rosalia) family group socializing, Poco Das Antas Reserve, Atlantic Forest, Brazil

Tui De Roy / Common Marmoset (Callithrix jacchus) mutual grooming between social group members, Atlantic Forest, Brazil

Tui De Roy / Guira Cuckoo (Guira guira) living in large social group, Caiman Ecological Refuge, Pantanal, Brazil

Tui De Roy / Guira Cuckoo (Guira guira) living in large social group, Caiman Ecological Refuge, Pantanal, Brazil

Tui De Roy / Andean Condor (Vultur gryphus) juvenile pair interacting on cliff edge, Colca Canyon, Peru

Tui De Roy / Andean Condor (Vultur gryphus) juvenile male pair socializing on cliff edge, Colca Canyon, Peru

Tui De Roy / Golden Lion Tamarin (Leontopithecus rosalia) family group socializing, Poco Das Antas Reserve, Atlantic Forest, Brazil

Thomas Marent / Barbary Macaque (Macaca sylvanus) pair grooming, native to northern Africa

Gerry Ellis / African Elephant (Loxodonta africana) orphaned baby Sweet Sally, meeting other orphans, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Shin Yoshino / Black-tailed Prairie Dog (Cynomys ludovicianus) group, Colorado

Tui De Roy / Andean Condor (Vultur gryphus) juvenile group socializing on cliff edge, Colca Canyon, Peru