Odd-toed ungulates, also known as perissodactyls, are a group of hoofed mammals characterized by having an odd number of toes on their feet. This group includes animals like horses, zebras, and rhinoceroses. They primarily belong to three families: Equidae (horses and relatives), Tapiridae (tapirs), and Rhinocerotidae (rhinos). These animals are herbivorous and have specialized digestive systems to process plant material. Odd-toed ungulates are generally larger than even-toed ungulates, which include animals like cows and sheep. Their unique toe structure helps them adapt to various environments, from grasslands to forests.