A chicken (Gallus gallus domesticus) is a kind of domesticated bird. It is raised in many places for its meat and eggs. They are usually kept by humans as livestock. Most breeds of chickens can fly for a short distance. Some sleep in trees if there are trees around.
A male chicken is called a rooster or a cockerel. A female chicken is called a hen. A young chicken is called a chick. Like other female birds, hens lay eggs. The eggs hatch into chicks.