The big-headed mole-rat, (Tachyoryctes macrocephalus), also known as the giant root-rat, Ethiopian African mole-rat, or giant mole-rat, is a rodent species in the family Spalacidae.It is endemic to Ethiopia's Bale Mountains. Its natural habitat is subtropical or tropical high-altitude grassland, where it can reach densities of up to 2,600 individuals per square kilometre. It is threatened by habitat loss.