Alex Mustard / Dugong (Dugong dugon) male and juvenile Golden trevally (Gnathanodon speciosus) swimming over Seagrass (Halophila stipulacea) meadow. Marsa Nabaa, Marsa Alam, Egypt.

Wim van den Heever / African elephant (Loxodonta africana) close up of skin and ear, Ol?onyo Kenya.

Pete Oxford / Apatani woman with facial tattoos and traditional cane nose plugs / Yapin Hulo made to make them look unattractive to males from other tribes. These facial modifications are now outlawed. Apatani Tr...

Anup Shah / African elephants (Loxodonta africana) wallowing at a waterhole, wide angle view. Maasai Mara National Reserve, Kenya.

Cheryl-Samantha Owen / African elephant (Loxodonta africana) close up of trunk, Amboseli National Park, Kenya.

Anup Shah / African elephant (Loxodonta africana) close-up. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Anup Shah / African elephant (Loxodonta africana) herd at waterhole with calves seen between adults legs. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Enrique Lopez-Tapia / Portrait of two Balti men, Skardu, Pakistan, June 2007.

Oriol Alamany / Close up of skin on the ear and back of an African elephant (Loxodonta africana), Mopani, Kruger National Park, Transvaal, South Africa, September.

Lynn M Stone / Pug dog portrait

Yves Lanceau / Domestic dog, Shar Pei / Chinese fighting dog, two black puppies

Yves Lanceau / Domestic cat, Sphynx, male, 2 years, standing portrait.

Anup Shah / Bonobo (Pan paniscus) mature male 'Makali', portrait, Lola Ya Bonobo Sanctuary, Democratic Republic of Congo. October.

Anup Shah / Bonobo (Pan paniscus) baby aged 9-12 months, portrait, Lola Ya Bonobo Sanctuary, Democratic Republic of Congo. October.

Mark Taylor / Head portrait of a Bulldog puppy, 11 weeks.

Yves Lanceau / Domestic dog, Shar Pei / Chinese Fighting Dog, puppy urinating

Jeff Vanuga / Close up of eye of a bull African Elephant (Loxodonta africana) showing 'tears', Masai Mara Game Reserve, Kenya, September

Jane Burton / Dogue de Bordeaux puppy chewing on toy, 15 weeks

Jane Burton / Apricot Pug, 2 years old.

Pete Oxford / Galapagos sealions (Zalophus californianus wollebaeki) Mother and pup, Espa?? / Hood Is, Galapagos

Peter Blackwell / Close up of African elephant skin around tail {Loxodonta africana} Amboseli NP, Kenya, East Africa

Wild Shots Outreach / White rhino (Ceratotherium simum) head portrait, Greater Kruger Area, South Africa. Photographed by Wild Shots Outreach course student Megan Mashigo.

Wild Shots Outreach / African elephant (Loxodonta africana) portrait, Greater Kruger Area, South Africa. Photographed by Wild Shots Outreach student Nothando Mkhombo.

Shane Gross / Male Southern elephant seal (Mirounga leonina) portrait, Gold Harbour, South Georgia Island.

Shane Gross / Male Southern elephant seal (Mirounga leonina) portrait, Gold Harbour, South Georgia Island.

Shane Gross / Southern elephant seal (Mirounga leonina) resting, portrait, Gold Harbour, South Georgia Island.

Klein & Hubert / African elephant (Loxodonta africana) skin detail, Kenya, Africa.

Mark Taylor / RF - Grey Sphynx kitten, age 11 weeks, with paw raised. (This image may be licensed either as rights managed or royalty free.)

Mark Taylor / RF - Grey Sphynx kitten, age 11 weeks, portrait. (This image may be licensed either as rights managed or royalty free.)

Mark Taylor / RF - Grey Sphynx kitten, age 11 weeks, sitting. (This image may be licensed either as rights managed or royalty free.)

Mark Taylor / RF - Grey Sphynx kitten, age 11 weeks. (This image may be licensed either as rights managed or royalty free.)

Enrique Lopez-Tapia / Elderly Ladakhi woman, portrait. Ladakh, India. 2011.

Nick Hawkins / Volcan Alcedo Galapagos giant tortoise (Chelonoidis nigra vandenburghi), portrait. Isabela Island, Galapagos.

Tony Heald / Southern elephant seal (Mirounga leonina), male bloodied after a fight. Right Whale Bay, South Georgia. September.

Tony Heald / Elephant (Loxodonta africana), male standing on hind legs to reach acacia pods. Cattle egrets (Bubulcus ibis) around elephant's feet. Mana Pools National Park, Zimbabwe.

Denis-Huot / Elephant (Loxodonta africana), close-up of skin, Masai-Mara Game Reserve, Kenya

Inaki Relanzon / Espanola giant tortoise (Geochelone hoodensis). Previously extinct on Espanola Island, they are now being reintroduced from the Charles Darwin Research Station and Breeding Center, Santa Cruz, Galapa...

Inaki Relanzon / Espanola giant tortoise (Geochelone hoodensis). Previously extinct on Espanola Island, they are now being reintroduced from the Charles Darwin Research Station and Breeding Center, Santa Cruz, Galapag...

Inaki Relanzon / Espanola Giant tortoise (Geochelone hoodensis), previously extinct on Espanola Island, it is being reintroduced by the Charles Darwin Research Station's Breeding Center, Santa Cruz, Galapagos Islands.

Inaki Relanzon / Espanola Giant tortoise (Geochelone hoodensis) showing saddle-shaped shell, previously extinct on Espanola Island, it is being reintroduced by the Charles Darwin Research Station's Breeding Center, Sa...

Inaki Relanzon / Espanola Giant tortoise (Geochelone hoodensis) showing saddle-shaped shell, previously extinct on Espanola Island, it is being reintroduced by the Charles Darwin Research Station's Breeding Center, Sa...

Inaki Relanzon / Espanola Giant tortoise (Geochelone hoodensis) showing saddle-shaped shell, previously extinct on Espanola Island, it is being reintroduced there by the Charles Darwin Research Station's Breeding Cent...

Inaki Relanzon / Espanola Giant tortoise (Geochelone hoodensis), previously extinct on Espanola Island, it is being reintroduced by the Charles Darwin Research Station's Breeding Center, Santa Cruz, Galapagos Islands.

Inaki Relanzon / Espanola Giant tortoise (Geochelone hoodensis), previously extinct on Espanola Island, it is being reintroduced by the Charles Darwin Research Station's Breeding Center, Santa Cruz, Galapagos Islands.

Mark Taylor / Shar Pei puppy standing.

Eric Baccega / RF - Two walrus (Odobenus rosmarus) resting on ice. Foxe Basin, Nunavut, Canada. (This image may be licensed either as rights managed or royalty free.)