In Savute — the remote corner of Botswana's Chobe district where the dried Savute Channel has made this floodplain one of Africa's most concentrated predator territories — the impala occupies a precise and not enviable position in the food chain: the most numerous antelope in southern Africa, and therefore the primary prey of nearly every large carnivore in the ecosystem. "DK" designates the photographic treatment: dark key, a low-key rendering in which the animal emerges from deep shadow, the light defining form rather than illuminating it wholesale, the background dropping away into black. In this treatment, what you see is the impala's structure — the arc of the horns, the set of the ears, the particular alertness of an animal that has learned to treat stillness as survival. The dark-key approach removes the landscape and the context and leaves only the animal's presence, which turns out to be considerable. Savute has been photographed for decades; this image finds its register in the shadow rather than the light.