Christophe Courteau / African elephants (Loxodonta africana) swimming across Chobe River, trunks raised above surface for breathing, Chobe National Park, border between Botswana and Namibia.

David Pattyn / Children snorkelling in the sea and swimming with bottlenose dolphins (Tursiops truncatus) with boat approaching. Indian Ocean, Zanzibar, Tanzania, August 2014.

Bryan and Cherry Alexander / Chukchi girls, with their family's ancestral clan mark painted in reindeer blood on their face, a ritual during the Chukchi 'Festival of the Young Reindeer' during which young reindeer are sacrificed....

Cheryl-Samantha Owen / West Coast Rock Lobster (Jasus lalandii) observed by diver. Kalk Bay, Atlantic Ocean, False Bay, Valsebaai, Western Cape, South Africa

Nick Turner / Couple with child in seat cycling in the Cotswolds at Guiting Power, Gloucestershire, UK, August 2011. Model released

Nick Turner / Walkers on the South West Coast Path National Trail near Durdle Door, Dorset, UK, May 2009.

Gerry Ellis / Rainforest logging activities near eastern boundary of the Kikori Delta, Papua New Guinea

Shane Gross / Coral reef scene filled with a great diversity of fish and coral life, near Alor, Indonesia.

Juergen Freund / Night time at the Daintree Drought Experiment in northern Queensland with Johan Larson of the Daintree Rainforest Observatory looking for insects during his regular night spotlighting activities. Dain...

Juergen Freund / Night time at the Daintree Drought Experiment in northern Queensland with Johan Larson of the Daintree Rainforest Observatory looking for insects during his regular night spotlighting activities. Dain...

Roger Powell / Airboat used by tourists for leisure activities; this type of vessel, because of its shallow draft, can get into areas that other boats can't, however it is extremely noisy and disturbs wildlife, espe...

Ernie Janes / Stile and footpath, Aldbury Nowers Nature Reserve, the Chilterns, Hertfordshire, UK, July