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Plymouth Rock chicken

life science Maturity 5-7 Next article →

The Plymouth Rock is a famous breed of domestic chicken from the United States. It is categorized as a dual-purpose breed. This term means the bird is useful for two main reasons. Farmers raise them for their meat and for their brown eggs. This breed is very hardy and easy for people to manage. It has a strong resistance to cold weather. It is also known as a good sitter, which helps with raising young chicks.

Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)
Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)

Physically, the Plymouth Rock has very specific features. It possesses a single comb on its head with five distinct points. The comb, the wattles, and the ear-lobes are all a bright red color. The bird has a long and broad back with a fairly deep breast. Its beak can be yellow or horn-colored. One of its most recognizable traits is its legs. The legs are yellow and are unfeathered, meaning they are clean of feathers.

Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)
Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)

The history of this breed involves careful selective breeding. The Plymouth Rock was first shown in Boston in 1849. However, it did not appear again for twenty years. In 1869, a man named D.A. Upham worked in Worcester, Massachusetts. He performed cross-breeding using Black Java hens. He paired them with a cock that had barred plumage and a single comb. Upham selectively bred these birds for two specific traits. He wanted barred plumage and clean, featherless legs. The modern Plymouth Rock is thought to come from these birds.

Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)
Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)

Scientists use genomic analysis to study how this breed was made. This study of DNA suggests the breed mainly comes from the Dominique chicken. It also received substantial contributions from the Java and Cochin breeds. Other breeds like the Brahma and the White-faced Black Spanish may have played a role too. The breed was officially included in the American Standard of Perfection in 1874. This was part of the new American Poultry Association. The barred plumage pattern was the very first variety recorded.

Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)
Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)

There are many different color varieties of the Plymouth Rock. In the United States, seven varieties are recognized. These are barred, blue, buff, Columbian, partridge, silver-penciled, and white. Different organizations recognize different numbers of types. The Entente Européenne d'Aviculture et de Cuniculture lists ten plumage varieties. The Poultry Club of Great Britain recognizes five of these. Those five are barred, black, buff, Columbian, and white. In Australia, the barred variant is split into dark barred and light barred.

Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)
Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)

For a long time, this was the most common chicken in the United States. It held this position until about the time of World War II. As industrial chicken farming grew, the breed's role changed. It was used to develop broiler hybrids. A broiler is a chicken raised specifically for meat. Today, the breed is listed as "recovering" by the Livestock Conservancy. This means there are at least new registrations every year. In 2026, the estimated worldwide population was reported at almost 400,000. About 200,000 were barred Plymouth Rocks. Just under 200,000 were the white variety.

Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)
Tab05 Hühner (Geflügel-Album, Jean Bungartz, 1885)

The Plymouth Rock remains highly productive for farmers. A single hen lays about 200 large brown eggs per year. These eggs have an average weight of about 50 grams. In modern industrial agriculture, they are still very important. Experts cross white Plymouth Rock strains with white Cornish strains. This creates the principal stock used for American broiler production. This connection shows how an old breed still supports modern food systems.

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