Sumatra Chicken (aka Ayam Galak)
The Sumatra is a breed of chicken native of the island of Sumatra. Chickens were originally imported from Sumatra in 1847 to the U.S. and Europe as fighting cocks for the purpose of cockfighting, but today the breed is primarily kept forexhibition. 1883 is the year the Black Sumatra was first inducted into the American Standard of Perfection.
Sumatras are primarily an ornamental breed kept for their attractive plumage. Most often they are a lustrous black with a green sheen throughout the body and tail. source