Domestic fowl are birds that have been domesticated for human use, such as for food, eggs, and feathers. The most common domestic fowl are the ROOSTER, LEGHORN, POULTRY, and CHICKEN. Roosters are male chickens that are known for their loud crowing and colorful plumage. Leghorns are a breed of CHICKEN that is known for its egg-laying abilities. POULTRY is a term used to refer to any domesticated bird, including chickens, ducks, geese, and turkeys. Chickens are the most popular type of POULTRY, and they are kept for their meat and eggs.