Aerial view of four student reading the koran in circle sitting on colourful carpet in Rupganj, Narayanganj, Dhaka, Bangladesh.

Southern elephant seal (Mirounga leonina), male, after harem and breeding season on the Falkland Islands.

A young Maasai warrior holding a stick in the Ngorongoro Protected Area, Tanzania.

A gaucho of the Estancia Bonanza with his horse and the Mount Fitz Roy in background, El Chalten, Argentina. (MR)

A gaucho of Estancia Bonanza on horseback with the Fitz Roy Mountain in the background, El Chalten, Argentina. (MR)

Portrait of a Morris Dancer, Oxford, Oxfordshire, England, UK

Parson's chameleon (Calumma parsonii) in Ranomafana National Park, Madagascar

Tassia Lodge, Lekurruki conservancy, Kenya, a Maasai man poses with his spear before a dramatic cloudy sky.

Coastal brown bears hunting salmon, Redoubt Bay, Alaska, USA

Male Gorilla, silverback, Bwindi impenetrable national park, Uganda, East Africa

Cheetah, Serengeti National Park, Tanzania

Powwow, Fort Washackie, Wyoming, USA

Portrait of Quechua woman, Peru, Cuzco Province, Incas sacred valley, Chinchero,

Meerkat, Makgadikgadi Salt Pans, Botswana

Campi ya Kanzi, Chyulu Hills, Kenya, portrait of a Maasai woman in the mess area.

Africa; South Sudan; Kapoeta. A portrait of an old Toposa lady in traditional attire.

Africa; South Sudan; Kapoeta. A portrait of a Toposa lady in traditional attire and scarification on her forehead and chest.

Portrait of novice monk with red umbrella, Bagan, Mandalay Region, Myanmar

Woman from Pa-O tribe wearing traditional orange headwear, village near Kalaw, Kalaw Township, Taunggyi District, Shan State, Myanmar

Two men stand looking out over the city, Kabul, Afghanistan

Common Merganser (Mergus merganser) female, Mecklenburg-Western Pomerania, Germany

Rasta Man at Rastafarian Community, Blue Mountains, Saint Andrew Parish, Jamaica

Graffiti Mural Painting at Bob Marley Museum, 56 Hope Road, Kingston, Saint Andrew Parish, Jamaica

Leopard, Okavango Delta, Botswana

Zebra at sunrise, Okavango Delta, Botswana

Elephant bull, Baines Baobabs, Nxai Pan National Park, Botswana

Lion, Chobe River, Chobe National Park, Botswana

Chacma Baboon, Chobe River, Chobe National Park, Botswana

A tobacco farmer smoking a Cuban cigar in Vinales, Pinar del Rio Province, Cuba

Gelada Baboon (Theropithecus gelada) opening its mouth, Simien Mountains National Park, Ethiopia

Snowy Owl (Bubo scandiacus) portrait, looking at camera

Two people sitting in Plaza Vieja (Old Town Square), Havana, Cuba

A young monk reading by a window inside a temple, UNESCO, Bagan, Mandalay Region, Myanmar

African buffalo or Cape buffalo (Syncerus caffer) in Lake Nakuru National Park

King Penguin feeding a chick in brown plumage, Falkland Islands.

Portrait of Sandia the Watermelon Seller, Getsemani Barrio, Cartagena, Bolivar Department, Colombia, South America

Man with beard dyed with saffron, Bogra District, Rajshahi Division, Bangladesh.

Bald Eagle (Haliaeetus leucocephalus), portrait, captive, Saarland, Germany, Europe