It was bred from local fowls of mixed origin, Rhode Island Reds, Barnevelders, and Partridge Leghorns, Cochin, Wyandotte at the beginning of the 20th century. In 1922-23 steps were taken to fix a standard after the birds began to show a good deal of uniformity. The eggs were originally exported for the commercial egg trade where they were an instant hit. Soon after stock was imported into England. The breed was added to the British Standard in 1930.
It is a light, docile breed, with rustic-red and orange colour. Representations of cockerels in the media are often based upon the "classic" Welsummer look. The most common example of this would be the Kelloggs Cornflakes rooster. Its eggs are dark-brown and spotty. There are three variations of the standard Welsummer, these are the Partrige, Silver Duckwing and the Gold Duckwing. There is also a Bantam Welsummer breed which is similar but lays light brown eggs. Bantams exist in both Partrige and Silver Duckwing colours.