Animals that only eat other animals are called carnivores. This dietary classification includes a wide range of species, from small predators like weasels to large carnivorous mammals such as lions and bears. Carnivores play a vital role in ecosystems as they help regulate prey populations, contribute to food web stability, and promote biodiversity. They often have specialized physical adaptations for hunting and consuming prey, such as sharp teeth and claws. Some carnivores, known as obligate carnivores, rely solely on animal flesh for their nutritional requirements, while others may also consume fruits or vegetation.