The Jangmigye (Korean: 장미계), also known as the Ginkkori-dak (긴꼬리닭, 'long-tail chicken'), is one of the heritage breed of chicken from Korea that noted for its long tail.^[1] Males of this breed can have tails of up to 1.5 metres (4.9 ft) in length.^[2] The breed is estimated to have arisen in Korea in the middle of the third century. The Ginkkoridak is listed by the United Nation's Food and Agriculture Organization.^[3]

The breed has existed since ancient Korea but almost disappeared in the early 1900s due to the introduction of commercial chicken farming with non-native breeds. One farmer is believed to have obstinately maintained the Ginkkoridak; as of 2021,^[update] there are 250 individuals held in conservancy.^[1]

Unlike the Onagadori, a Japanese breed of long-tailed chicken, the tail feathers of the Ginkkoridak molt annually after the rainy season.^[1][2]