| The impala and rhebok were also not included in tribe-level analyses because each is the sole extant member of its tribe. |
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| Grey rhebok are less commonly seen and are scarce, but may be observed along the beach hills at Olifantsbos. |
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| Usually, all species of the Alcelaphinae, Antilopinae, Hippotraginae, Reduncinae, Cephalophinae, many Bovinae, the grey rhebok, and the impala are called antelopes. |
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