A castrated male fowl is known as a 'capon'. A capon is a rooster that has been surgically castrated before reaching sexual maturity. This is usually done to improve the quality of its meat, as capons tend to have more tender, flavorful, and juicy meat compared to regular roosters. Capons are also larger in size than regular roosters, and their meat has a more delicate flavor and texture. Capons were traditionally raised for meat in many parts of the world, and they are still considered a delicacy in some countries, particularly during festive occasions.