Neil Aldridge / African skimmer (Rynchops flavirostris) resting on a sandbank in the middle of the Chobe River between Botswana and Namibia.

Wim van den Heever / Oryx (Oryx gazella) lone animal standing on the top of a red dune, Sossuvlei, Namibia.

Staffan Widstrand / Greater kudu (Tragelaphus strepsiceros) male by sand dunes, St Lucia Wetlands National Park, South Africa

Wim van den Heever / Gemsbok (Oryx gazella) two walking across sand dunes, aerial view. Namibia.

Wim van den Heever / Ancient dead Camelthorn tree (Vachellia erioloba) trees with red dunes, Namib desert, Deadvlei, Sossusvlei, Namibia. August 2015.

Wim van den Heever / Ancient dead Camelthorn tree (Vachellia erioloba) trees with red dunes and mist, Namib desert, Deadvlei, Sossusvlei, Namibia. August 2015.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with red dunes, and star trails, Namib desert, Sossusvlei, Namibia. Composite.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with red dunes and the milky way behind, Namib desert, Sossusvlei, Namibia. Composite.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) at night with red dunes behind. Namib desert, Sossusvlei, Namibia. Composite.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with sand dunes, Namib desert, Deadvlei, Sossusvlei, Namibia.

Wim van den Heever / Ancient dead Camelthorn trees (Vachellia erioloba) with sand dunes, Namib desert, Deadvlei, Sossusvlei, Namibia.

Juan Carlos Munoz / Sand dunes with some desert vegetation at base, Namib-Naukluft National Park, Namibia, June 2015.