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 exhibit a variety of colors and sizes, depending on the breed, and are known for their social behavior and ability to adapt to different environments. Chickens are omnivorous, feeding on grains, seeds, insects, and even small animals. They have a complex social structure, often forming flocks with a clear hierarchy. The domestication of chickens dates back thousands of years, and they play a significant role in agriculture and food production, contributing to the diets of millions of people globally.