While it’s not necessary to be an ornithologist, a basic knowledge of chicken anatomy can be very helpful when talking about your home flock to other poultry enthusiasts or the vet. A ANATOMY OF THE DOMESTIC CHICKEN The following diagram shows the key external features of the domestic hen. A. Cape B. Comb C. Beak D. Ear E. Wattle F. Hackle G. Plumage H. Scales I. Claws J. Spur B C E D G F H I J Male and female chickens have all the same basic parts, and it can be quite difficult to tell them apart when they are young. The differences between males and females become clearer as birds mature, with male chickens displaying a larger comb and wattles, and longer spurs than females. The following diagram illustrates the key internal features of the domestic hen. Kidney Oviduct Crop Gizzard Liver Heart Cloaca Small Intestine Duodenal loop Ovary Caeca Lungs THE CHOOK BOOK | 7