The most common herbivores are the ungulates, including horses, rhinos, tapirs and artiodactyls. Ungulates are large grazing mammals with hooves and long legs - perfect for running across grasslands to escape hunting animals. The hooves enable them to run very fast on the tips of their toes, without their heels touching the ground. They usually have keen senses to find their prey, strong and agile bodies to catch it and sharp teeth and claws to kill it. Meat is very nourishing compared to vegetation, so while herbivores tend to eat all the time, carnivores can usually rest a while after a meal - and save their energy for hunting their next victim.
Most carnivores are either a kind of dog or a kind of cat.
The dogs include wolves, jackals and coyotes. Bears, too, are similar to dogs, but they tend to be omnivores rather than carnivores. Insectivores are animals that eat insects, although most eat other small animals too, but they are not really hunters like the big cats. They are usually fairly small creatures with pointed snouts and sharp teeth, like shrews, hedgehogs and moles. Omnivores Most mammals eat both plants and animals from time to time.