• A herbivore is an animal that gets its energy from eating plants, and only plants. Omnivores can also eat parts of plants, but generally only the fruits and vegetables produced by fruit-bearing plants. Many herbivores have special digestive systems that let them digest all kinds of plants, including grasses. There are many different types of herbivores. Many eat a variety of plants, while some stick to one type of plant. Those who stick to one type of plant have their own special classifications. For example, animals that eat primarily fruit are called frugivores, according to Encyclopedia Britannica. Fruit bats and flying foxes are examples of frugivores. And, animals and insects that eat mostly leaves — such as pandas, caterpillars, giraffes or koalas — are called folivores.

• Herbivores can be very large or very small. The world’s largest herbivore is the African elephant. It can grow to 8.2 to 13 feet (2.5 to 4 meters) from foot to shoulder and weigh 5,000 to 14,000 lbs. (2,268 to 6,350 kilograms) according to National Geographic. An adult can eat up to 300 lbs. (136 kg) of vegetation, including fruit, roots, grasses and bark in a single day.