Ehtiopian Bulls (or Tauros Aithopikos) were a carnivorous breed of bulls native to Ethiopia. It had red hide and was impervious to weapons. While the earliest recording of them is from Plithy the Elder, the best account comes from the second century Greek author Aelianus. In his book "On Animals" Aelianus stated (in Greek) what translates out to be "It seems that those Aithiopian (Ethiopian) Bulls which they call ‘flesh-eaters’ are the most savage of animals. They are twice the size of Bulls in Greece, and their speed is very great. Their hair is red, their eyes blue-grey, more so than the eyes of lions. In normal times they move their horns as they do their ears, but when fighting they raise them, making them stand strongly up, and so do battle; and once raised in passion owing to some truly wonderful natural cause their horns do not go aslant. No spear, no arrow can wound them: iron, you see, does not penetrate their hide, for the Bull raises its bristles and throws off the weapons showered upon it in vain. And it attacks herds of horses and also wild animals. Accordingly herdsmen who wish to protect their flocks dig deep concealed ditches and by these means ambush the Bulls. And when they fall into these ditches they are choked with rage. Among the Troglodytoi (Troglodytes, Cave-Dwellers) this is judged to be the king of beasts, and rightly so, for it possesses the courage of a lion, the speed of a horse, the strength of a bull, and is stronger than iron."