Gallus gallus domesticus, commonly known as the domestic chicken, is a subspecies of the red junglefowl. These birds are primarily raised for their eggs and meat, making them one of the most common livestock animals worldwide. They are known for their social behavior and can be found in various colors and sizes, depending on the breed. Chickens are omnivorous, feeding on grains, seeds, insects, and even small animals. They have a unique communication system, using different sounds to convey messages. Domestic chickens are also known for their ability to adapt to various environments, making them a staple in agriculture across many cultures.