Which perissodactyls mainly graze on grasses?

Perissodactyls, which are members of the order Perissodactyla, are categorized as either grazers or browsers. Among these odd-toed ungulates, several species are known to graze primarily on grasses:

• Zebras: Specifically, the plains zebra is a notable grazer that often migrates long distances to reach succulent pastures.1
• Rhinoceroses: While many rhinoceroses are browsers, the white rhinoceros is a highly specialized grazer characterized by a broad, square muzzle adapted for feeding on grass.1
• Horses and Asses: These animals are also known to inhabit arid areas where their distribution is largely determined by the availability of pasture and rainfall.1

While these animals are primarily grazers, it is important to note that the order also includes browsers, such as tapirs and other rhinoceros species, which feed on leaves and twigs.21