The primary diet of an herbivore consists of plant material. Herbivores consume a variety of vegetation, including leaves, stems, roots, flowers, and fruits. Some common examples of herbivores are cows, sheep, elephants, and rabbits. They have specialized digestive systems that help break down tough plant fibers, with some species having multiple stomachs or specialized gut flora to aid in digestion. For example, ruminants like cows regurgitate food to chew it again, improving nutrient absorption. This dietary preference plays a crucial role in ecosystems, as herbivores serve as primary consumers in food chains.