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The fringe-eared oryx (Oryx beisa callotis) is a subspecies of East African oryx. It was originally described as a distinct species by Oldfield Thomas in 1892, but was subsequently re-evaluated as a subspecies by Richard Lydekker in 1912. Recently, analysis using the phylogenetic species concept has led some authors to conclude that it should be returned to full species status (Oryx callotis).

Fringe-eared oryxes are found only in southeastern Kenya and northeastern Tanzania. Although previously not found within the present-day boundaries of the Serengeti National Park, herds of oryx began moving into that area in 1972, where they still remain. They inhabit semi-arid grasslands, scrubland, and Acacia woodland, being most common in areas with an annual rainfall of 40 to 80 centimetres per year. Predictions by the IUCN indicate that they may soon become restricted to national parks and similarly protected areas, due to pressure from poachers and habitat loss due to agriculture outside such areas.

Source : Wikipedia