Determine a horse's breed from a picture by looking at its color and defining characteristics. For instance, appaloosas boast spotted coats, readily distinguished by pictures. The spots come in snowflake, marble and leopard variations and can decorate its entire body, include its hoofs or only its rump.

Identify an Arabian horse by its small head, large eyes, inwardly curved ears and high-set tail. Its neck is high-crested and deeply arched, moving into prominent withers located just above the shoulders and the bottom of the neck. It also boasts a thick chest and comes in gray, bay and chestnut colors. Like the Arabian, the American quarter horse also has a deep chest, sloping shoulders and small head, but it stands slightly higher than the Arabian's 14 to 15.3 hands. It mostly has a chestnut coat.

Heavy bodies, large musculature and height characterize the Clydesdale, a draft horse that often has white feathers on its feet and markings on its face and nose. It has a large head and ears.

The Shire is even larger than the Clydesdale, reaching up to 19 hands. The thoroughbred is tall, slender-limbed and long-boned with a long neck and powerful legs. Przewalski's horse, the last surviving primitive horse, is a short, stocky equine with a dun-colored hide, cream nose and stomach, and black points.