Juergen & Christine Sohns / Meerkat (Suricata suricatta) on alert, Tswalu Game Reserve, South Africa

Ralph Pace / Green Sea Turtle (Chelonia mydas), San Diego, California

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) mother and calf, Maui, Hawaii

David Fleetham / Cleaner wrasse (Labroides dimidiatus) swimming alongside Golden damsel (Amblyglyphidodon aureus) looking for parasites, Fiji, Pacific Ocean.

Richard Du Toit / Black Wildebeest (Connochaetes gnou), Rietvlei Nature Reserve, South Africa

Thomas Marent / Saddle-back Tamarin (Saguinus fuscicollis) mother with young, Tambopata-Candamo Nature Reserve, Peru

Cyril Ruoso / Woman with baby looking at Sisal (Agave sisalana) fibres drying for rope making, Berenty Reserve, Madagascar.

Richard Du Toit / Black wildebeest (Connochaetus gnou) bull silhouetted at dawn, Rietvlei Nature Reserve, Gauteng Province, South Africa.

David Pattyn / Puffin (Fratercula arctica) silhouettes, Hornoya, Varanger, Finnmark, Norway, May.

Walter Soestbergen / Eurasian Sparrowhawk (Accipiter nisus) male, Utrecht, Netherlands

Mark Taylor / French Bulldog sitting looking up, close up of muzzle

Markus Varesvuo / Red-throated Diver (Gavia stellata) on water, cleaning feathers, Vaala, Finland, June