A hen is a female chicken, a domesticated bird commonly raised for its eggs and meat. Hens belong to the species Gallus gallus domesticus and are known for their distinctive clucking sounds. They typically have a plump body, a small head, and a comb on top of their heads. Hens can lay eggs regularly, usually producing one egg per day under optimal conditions. Hens are social animals and often live in groups called flocks. They have a varied diet that includes grains, seeds, and insects. In addition to providing food, hens play a role in agriculture by helping to control pests and fertilize soil through their droppings.