through the white. Gonggolma (공골마, sorrel): The coat is chestnut with a cream-colored mane and tail. Gorama (고라마, fallow or dun): The entire coat color is light brown with a black dorsal stripe stretching from mane to tail and with black lower legs. Buruma (부루마, roan): The coat color is a mixture of bay, chestnut, and black with white. It has less white hair than Chongma, and the legs especially exhibit the basic coat color without white spots. Geoheulma (거흘마, spotted): The colors around its eyes, lower abdomen, and legs are lighter or whiter than that of the entire coat. Jaheulma (자흘마, speckled): The coat has different sizes of freckles scattered over its entire body. Horses with the same coat color are often named differently depending on the tone of the color. The position of a white spot also creates other names as follows: Ganjeoni(간전이): It has a white line stretching from forehead to nose. Gollimae(골리매): It has circles around its eyes that resemble glasses. Gwangganjeoni(광간전이) or Wangganjeoni(왕간전이): It has a broad white line stretching from forehead to nose. Myeonbaegi(면백이): It has a white face. Myeonjogi(면조기): It has hairless ankles. Mokhani(목하니): It has white spots around its neck. Satoongi(사퉁이): One of its eyes is angled in. Iongi(이옹이): It has a crooked tail that exposes its anus. Jeopsoogi(접수기): It has lower withers with a higher back. Jokbari(족발이): It limps with one of its legs a bit shorter than the others. Pimari(피마리): It has a white spot on its nose. Hwaldeungi(활등이): It has a deep-set back. A stallion reaches suitable breeding age by roughly three to four years old, and a three-year-old mare is in the best breeding condition during the spring. The official breeding period lasts for 25 years. Jeju horses belong to long day breeders, whose mating occurs from March to August in Jeju. The estrous cycle is 20 to 24 days (e.g. 22 days on average), and the estrus usually lasts 4 to 11 days (e.g. 7 days on average). Within 7 to 10 days (e.g. 8 days on average) after delivery, the mare undergoes another estrus, which reoccurs every 22 days. History From the examination of horse teeth that were excavated from shell middens in Gwakji-ri and in Handeulgul Cave in Wollyeong-ri, horses are estimated to have been on Jejudo Island since the end of the Stone Age or the beginning of the Bronze Age. A historical document