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. The breed comes in blue and white varieties, as well as the unstandardised splash - a natural result of breeding blue chickens. Males usually weigh between 4 and 5 pounds, and females weigh between 31⁄2 and 4 pounds. Hens are poor layers with yearly totals of eggs amounting to about 100 white eggs a year, and are exceptionally susceptible to broodiness. Both males and females have small to nonexistent wattles, and males often have multiple spurs on each leg. The breed is considered a primitive one; the Sumatra retains a strong flying ability, unlike most modern chicken breeds. The males will fight for dominance, though they usually do not fight to the death.