The topi is a medium-sized antelope with a striking reddish-
brown to purplish-red coat that is glossy, even iridescent in
bright sunlight. Each male has his "stomping ground," a patch
of trampled bare earth upon which he stands. He defines his
territory by depositing dung in a series of places, marking grass
stems with his scent from the preorbital face glands and
standing for long periods on a prominent place, where he can
easily be seen by other topis. If another male intrudes upon his
territory, the two go down on their knees and fight with their
horns, pushing each other to and fro.