While large in size, the black eyes of the antelope are
nothing for this animal to boast about. In low light, the
antelope's eyes become useless. The vulnerable animal must
instead rely on smell and hearing to sense danger. Even in
sunlight, the antelope's vision is unreliable. If an
unfamiliar object is not in full view or in motion, the
antelope has difficulty differentiating it from its
surroundings.