Animals that eat both plants and animals are termed omnivores. This dietary classification includes a wide variety of species, from humans to bears and many bird species. Omnivores have evolved to possess a diverse digestive system capable of processing both plant material and meat, allowing them to adapt to different food sources in their environments. This adaptability can provide a survival advantage in changing habitats or when food resources fluctuate. Omnivores play important roles in ecosystems, often helping to control populations of both plant and animal species.