Richard Du Toit / Aerial view of Common zebra {Equus quagga} crossing the Makgadikgadi salt pans, Botswana

Richard Du Toit / Aerial view of Gemsbok {Oryx gazella gazella} galloping across sand dunes, Namib Naukluft Park, Namibia

Richard Du Toit / Aerial view of Turkana Dromedary camels {Camelus dromedarius} crossing desert in evening sun with long shadows, Lake Logipi, Kenya

Richard Du Toit / Aerial view of Ostrich {Stuthio camelus} running across sand dunes, Namib Naukluft Park, Namibia

Staffan Widstrand / Aerial view of ice floe in midnight summer sun, floating off Ellesmere Island, Beaufort Sea, Arctic, Canada