 Walter's duiker was first recognised as a new species in 2010 when specimens of this duiker were found on sale at a bushmeat market.The duikers have not been observed by researchers in the wild, but are believed to come from the Dahomey Gap, an area of savannah which is a portion of the Guinean forest-savanna mosaic with a relatively dry climate, that extends all the way to the coast in Benin, Togo and Ghana, separating the rainforest zones on either side.This species is known from only forty-one specimens found in the last few decades and it has not been viewed in the wild.