The British Show Racer is a breed

Breed

A breed is a group of domestic animals or plants with a homogeneous appearance, behavior, and other characteristics that distinguish it from other animals or plants of the same species. Despite the centrality of the idea of "breeds" to animal husbandry, there is no scientifically accepted...

 of fancy pigeon developed over many years of selective breeding

Selective breeding

Selective breeding is the process of breeding plants and animals for particular genetic traits. Typically, strains that are selectively bred are domesticated, and the breeding is sometimes done by a professional breeder. Bred animals are known as breeds, while bred plants are known as varieties,...

. The British Show Racer along with other varieties of domesticated pigeons

Domestic Pigeon

The Domestic Pigeon was derived from the Rock Pigeon. The Rock Pigeon is the world's oldest domesticated bird. Mesopotamian cuneiform tablets mention the domestication of pigeons more than 5,000 years ago, as do Egyptian hieroglyphics.Research suggests that domestication of pigeons was as early as...

 are all descendants from the Rock Pigeon

Rock Pigeon

The Rock Dove or Rock Pigeon, is a member of the bird family Columbidae . In common usage, this bird is often simply referred to as the "pigeon"....

 (Columba livia). As the name suggests, this breed was developed as an exhibition breed in Britain from local stocks of racing pigeons. Douglas McClary in his book Pigeons for Everyone describes Show Racers as simply the "show version" of the popular racing pigeon.